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Telstar Electronics VoiceMax IS GARBAGE!
IDIOT!
"Telstar Electronics" wrote in message ups.com... |
Telstar Electronics VoiceMax IS GARBAGE!
"Radioisfun" wrote in message ... IDIOT! "Telstar Electronics" wrote in message ups.com... We know, it has been ripped apart on this newsgroup a few times. It's not a good product. If fitted without using the correct alignment procedures and test equipment it will ruin performance and cause splattering over the bands and generate harmonics. Not many people who have the "really loud = really far" mentality will know how to use test equipment, they tend to be the ones with a lack of knowledge. Maybe the type who believe polishing the aerial will lower the VSWR! The circuit has no RF filtering for a start, it is not screened in any way, it has a light that you will never see once the radio is put back together and it will have no benefit over the microphone that was designed to operate with the radio. It will cause distortion and harmonics unless the radio is realigned using test gear. If you use that on AM/SSB you will sound terrible, it is a waste of time. There is no way that the circuit differentiates between a voice and background noises, so raising the level many times and keeping it at 100% will mean that the sound will just be a "noise". Compare that to a normal mic, audio nearer to it such as the operator voice will be louder than what is in the background. The product is out of date, has no market and probably would have been better 20+ years ago. I certainly wouldn't recommend it, from a radio engineers point of view. |
What happened to the SkyWave 2879ABTC?
On Sep 18, 5:30 pm, "AUUDDIIOOO" wrote:
Just wondered on what happened to the Power amp He had. The SkyWave 2879ABTC was discontinued because of a poor profit margin. We hated to do it... but with the temperature compensating biasing... and all the premium components and chassis... it was just too costly to manufacture. Unlike other companies, we will discontinue a product before we will cost reduce it to a point that sacrafices quality and reliability. Sometimes I just go back and look at the photos... just for old times sake... http://www.telstar-electronics.com/d...9ABTCPhoto.htm www.telstar-electronics.com |
Telstar Electronics VoiceMax IS GARBAGE!
On Tue, 18 Sep 2007 22:40:24 +0100, "john lyon"
wrote: "Radioisfun" wrote in message ... IDIOT! "Telstar Electronics" wrote in message ups.com... We know, it has been ripped apart on this newsgroup a few times. It's not a good product. If fitted without using the correct alignment procedures and test equipment it will ruin performance and cause splattering over the bands and generate harmonics. Not many people who have the "really loud = really far" mentality will know how to use test equipment, they tend to be the ones with a lack of knowledge. Maybe the type who believe polishing the aerial will lower the VSWR! The circuit has no RF filtering for a start, it is not screened in any way, it has a light that you will never see once the radio is put back together and it will have no benefit over the microphone that was designed to operate with the radio. It will cause distortion and harmonics unless the radio is realigned using test gear. If you use that on AM/SSB you will sound terrible, it is a waste of time. There is no way that the circuit differentiates between a voice and background noises, so raising the level many times and keeping it at 100% will mean that the sound will just be a "noise". Compare that to a normal mic, audio nearer to it such as the operator voice will be louder than what is in the background. The product is out of date, has no market and probably would have been better 20+ years ago. I certainly wouldn't recommend it, from a radio engineers point of view. I was composing a point-by-point response to this when I had a power failure and lost it. I'm not about to redo it, but let me summarize. I am no fan of Telstar and his spam marketing on these groups and many of his claims are BS. That said, you seem to know little more about the subject than does he. BTW, to see the performance of this thing without the hype: http://www.analog.com/en/prod/0,2877,SSM2167,00.html |
Telstar Electronics VoiceMax
On Sep 19, 9:05 am, Wes Stewart wrote:
I am no fan of Telstar and his spam marketing on these groups and many of his claims are BS. That said, you seem to know little more about the subject than does he. BTW, to see the performance of this thing without the hype: Wes, I'm curious... what is this "hype" you are talking about? I would like to address that directly. www.telstar-electronics.com |
Telstar Electronics VoiceMax IS GARBAGE!
IDIOT!
"Telstar Electronics" wrote in message oups.com... |
What happened to the Telstar Electronics SkyWave 2879ABTC CB Amplifier? IT WAS GARBAGE TOO!
IDIOT
"Telstar Electronics" wrote in message ups.com... |
Telstar Electronics VoiceMax IS GARBAGE!
I conclude that the VOICEMAX issue has died, has had the funeral and now should
be buried. Those who advocate high distortion levels and poor quality signals can spend their $$$ and buy it. Those who prefer low distortion and clean sounding signals won't. Let the trip to the cemetery begin. /s/ Deek AUUDDIIOOO wrote: "john lyon" wrote in message ... "Radioisfun" wrote in message ... IDIOT! "Telstar Electronics" wrote in message groups.com... We know, it has been ripped apart on this newsgroup a few times. It's not a good product. If fitted without using the correct alignment procedures and test equipment it will ruin performance and cause splattering over the bands and generate harmonics. Not many people who have the "really loud = really far" mentality will know how to use test equipment, they tend to be the ones with a lack of knowledge. Maybe the type who believe polishing the aerial will lower the VSWR! The circuit has no RF filtering for a start, it is not screened in any way, it has a light that you will never see once the radio is put back together and it will have no benefit over the microphone that was designed to operate with the radio. It will cause distortion and harmonics unless the radio is realigned using test gear. If you use that on AM/SSB you will sound terrible, it is a waste of time. There is no way that the circuit differentiates between a voice and background noises, so raising the level many times and keeping it at 100% will mean that the sound will just be a "noise". Compare that to a normal mic, audio nearer to it such as the operator voice will be louder than what is in the background. The product is out of date, has no market and probably would have been better 20+ years ago. I certainly wouldn't recommend it, from a radio engineers point of view. Just like so called Engineers, your a dumb ass John. Your are an Engineer? What a Trash truck radio Engineer? There is a noise gate built in. Read his Good web site. Just wondered on what happened to the Power amp He had. |
VoiceMax Transceiver Speech Processor
On Sep 19, 12:42 pm, Deek wrote:
I conclude that the VOICEMAX issue has died, has had the funeral and now should be buried. Those who advocate high distortion levels and poor quality signals can spend their $$$ and buy it. Those who prefer low distortion and clean sounding signals won't. Let the trip to the cemetery begin. Thanks for your conclusion. Maybe you should contact the engineers at Analog Devices and explain to them that their SSM2166 chip is just plain no good. I'm sure they'd be happy to hear from you... lol www.telstar-electonics.com |
VoiceMax Transceiver Speech Processor
Telstar Electronics wrote:
On Sep 19, 12:42 pm, Deek wrote: I conclude that the VOICEMAX issue has died, has had the funeral and now should be buried. Those who advocate high distortion levels and poor quality signals can spend their $$$ and buy it. Those who prefer low distortion and clean sounding signals won't. Let the trip to the cemetery begin. Thanks for your conclusion. Maybe you should contact the engineers at Analog Devices and explain to them that their SSM2166 chip is just plain no good. I'm sure they'd be happy to hear from you... lol www.telstar-electonics.com I'm sure they will acknowledge that it introduces controlled distortion. |
VoiceMax Transceiver Speech Processor
On Sep 19, 12:58 pm, Deek wrote:
I'm sure they will acknowledge that it introduces controlled distortion. I'm surprised at you... being a chief engineer and all... you should realize that in this audio application we're talking strictly about harmonic distortion. After all, that's what you can hear. In the Analog Devices datasheet (page2)... this is given for the SSM2166 as "Total Harmonic Distortion including internal chip noise" of typical 0.25%... and a maximum of 0.5%. These figures rival the finest audio equipment! www.telstar-electronics.com |
VoiceMax Transceiver Speech Processor
Deek wrote:
Telstar Electronics wrote: On Sep 19, 12:42 pm, Deek wrote: I conclude that the VOICEMAX issue has died, has had the funeral and now should be buried. Those who advocate high distortion levels and poor quality signals can spend their $$$ and buy it. Those who prefer low distortion and clean sounding signals won't. Let the trip to the cemetery begin. Thanks for your conclusion. Maybe you should contact the engineers at Analog Devices and explain to them that their SSM2166 chip is just plain no good. I'm sure they'd be happy to hear from you... lol www.telstar-electonics.com I'm sure they will acknowledge that it introduces controlled distortion. ===================================== Which for radio voice comms does not matter all that much. Frank GM0CSZ / KN6WH |
Telstar Electronics VoiceMax
On Wed, 19 Sep 2007 08:28:58 -0700, Telstar Electronics
wrote: On Sep 19, 9:05 am, Wes Stewart wrote: I am no fan of Telstar and his spam marketing on these groups and many of his claims are BS. That said, you seem to know little more about the subject than does he. BTW, to see the performance of this thing without the hype: Wes, I'm curious... what is this "hype" you are talking about? I would like to address that directly. First why don't you address the spam marketing part? Then you can simply look the word "hype" up in a dictionary. It's a simple word with a more precise meaning than "fuzzy audio", for example. |
Telstar Electronics VoiceMax
On Sep 19, 1:29 pm, Wes Stewart wrote:
First why don't you address the spam marketing part? Then you can simply look the word "hype" up in a dictionary. It's a simple word with a more precise meaning than "fuzzy audio", for example. OK... just as I suspected... you have no legitimate concern. www.telstar-electronics.com |
What happened to the SkyWave 2879ABTC?
Hi,
On Wed, 19 Sep 2007 05:55:10 -0700, Telstar Electronics wrote: The SkyWave 2879ABTC was discontinued because of a poor profit margin. Raising the price was not an option? Cheers, __ Gregg |
What happened to the SkyWave 2879ABTC?
On Sep 19, 3:01 pm, geek wrote:
Raising the price was not an option? Raising the price is always an option but we felt that given the sales level at the original price... that an increase wouldn't be practical. www.telstar-electronics.com |
What happened to the SkyWave 2879ABTC?
On Sep 19, 3:01 pm, geek wrote:
Raising the price was not an option? Raising the price is always an option... but we felt it wasn't a practical one in this situation. www.telstar-electronics.com |
VoiceMax Transceiver Speech Processor
Distortion is more than harmonic distortion.
If any output does not replicate the input in amplitude and frequency response, there is distortion ... period! If a 1 Vp-p pure sine wave swept between 300 Hz and 3000 Hz goes into a device and produces an output of 2 Vp-p pure sine wave between 300 Hz and 3000 Hz there is a uniform gain of 2 and NO distortion. If a 1 Vp-p pure sine wave swept between 300 Hz and 3000 Hz produces 2 Vp-p at 300 Hz, then rises to 2.5 Vp-p at 1000 Hz and further rises to 2.8 Vp-p at 3000 Hz, the signal is distorted! The output is NOT a constant multiplier of the input. Run the test I posted. Or run it against a spectrum analyzer. Or, simply admit the output does not replicate the input. Lack of replication, in amplitude, frequency response or internal non-linearity, is distortion. A-D is specifying harmonic distortion ONLY. Speech compression is the deliberate introduction of distortion [to provide some desired result] In the recording industry, when analog recording was the norm, the recording studio distorted the recorded signal by the addition of 'pre-emphasis'. That is shaping the frequency response to compensate for known frequency variations in the recording media. The playback electronics may have had 'de-emphasis', depending upon recording media, to remove the effects of pre-emphasis and media distortion so that the output replicated the input. That is controlled distortion to achieve a desired result. Speech compression in radio-telephony is intentional distortion to achieve a perceived desired result. In mathematical terms TD = THD + dA/dF + dA/dT + dA/dV + d(Af(F))/dF ... should I continue? TD = Total distortion THD = Total Harmonic Distortion dA/dF = Intentional Amplitude variation as a function of frequency dA/dT = Amplitude variation as a function of temperature dA/dV = Amplitude variation as a function of bias voltage [AKA common mode, bias effects] d(Af(F))/df = Amplitude and gain variations as a function of gain roll off of the active device [a function of device gain rolloff [AKA gain*bandwidth product]]. I can add some more terms if you like. As a Chief Engineer I know and understand exactly what I am stating. A speech compression circuit deliberately produces a dA/dF, a variation in gain as a function of frequency, to achieve an intended result. It is distortion! As a company advertising and marketing a device, you should be precise in your language or define your terms explicitly. As far as I'm concerned this topic is dead, the funeral has been held, and the grave has been covered. I have no need to defend myself. Deek Telstar Electronics wrote: On Sep 19, 12:58 pm, Deek wrote: I'm sure they will acknowledge that it introduces controlled distortion. I'm surprised at you... being a chief engineer and all... you should realize that in this audio application we're talking strictly about harmonic distortion. After all, that's what you can hear. In the Analog Devices datasheet (page2)... this is given for the SSM2166 as "Total Harmonic Distortion including internal chip noise" of typical 0.25%... and a maximum of 0.5%. These figures rival the finest audio equipment! www.telstar-electronics.com |
What happened to the SkyWave 2879ABTC?
The SkyWave 2879ABTC was discontinued because of a poor profit margin. We hated to do it... but with the temperature compensating biasing... and all the premium components and chassis... it was just too costly to manufacture. Why on earth would you put temperature compensating components into this product. As far as I know no other doorstop on the market uses them. |
What happened to the SkyWave 2879ABTC?
On Sep 19, 8:53 pm, wrote:
Why on earth would you put temperature compensating components into this product. As far as I know no other doorstop on the market uses them. Not temp compensating components... temp compensating bias. www.telstar-electronics.com |
What happened to the SkyWave 2879ABTC?
On Sep 19, 3:01 pm, geek wrote:
Raising the price was not an option? Raising the price is always an option... but we decided this was not practical. www.telstar-electronics.com |
VoiceMax
On Sep 19, 12:22 pm, wrote:
i do truly admire the way you have these clowns helpsing advertise your product My hat is off to you. Funny how it works that way... lol www.telstar-electronics.com |
What happened to the SkyWave 2879ABTC?
On Thu, 20 Sep 2007 02:54:33 -0700, Telstar Electronics
wrote: On Sep 19, 8:53 pm, wrote: Why on earth would you put temperature compensating components into this product. As far as I know no other doorstop on the market uses them. Not temp compensating components... temp compensating bias. www.telstar-electronics.com Oh...your bias is magical? It uses no components for compensation? I always suspected your design to be that of an imaginary nature. |
What happened to the SkyWave 2879ABTC?
On Sep 20, 3:03 pm, wrote:
Oh...your bias is magical? It uses no components for compensation? I always suspected your design to be that of an imaginary nature. Not magical... it used the base-emitter voltage drop of an MJE3055T (mounted directly to heat sink) to track with the 2SC2879 power transistors. Since it used a transistor with gain... it worked so much better than just a plain old diode on the sink for tracking. It worked fantastic... I was able to set set class AB bias ( I chose about 200Ma) on the power transistors... and hold +/-5% collector current changes from -40 to +100C heat sink temp during amp operation. www.telstar-electronics.com |
What happened to the SkyWave 2879ABTC?
On Thu, 20 Sep 2007 17:08:23 -0700, Telstar Electronics
wrote in . com: On Sep 20, 3:03 pm, wrote: Oh...your bias is magical? It uses no components for compensation? I always suspected your design to be that of an imaginary nature. Not magical... it used the base-emitter voltage drop of an MJE3055T (mounted directly to heat sink) to track with the 2SC2879 power transistors. Since it used a transistor with gain... it worked so much better than just a plain old diode on the sink for tracking. It worked fantastic... How well it works depends on how well you hacked the design from this link I posted (while pointing out some of the many problems with your earlier splatterbox): http://www.ifwtech.co.uk/g3sek/tr-bias/tr-bias1.htm I was able to set set class AB bias ( I chose about 200Ma) on the power transistors... and hold +/-5% collector current changes from -40 to +100C heat sink temp during amp operation. That's interesting. Previously you said your bias scheme can "hold the 500mA bias to 10% from -30 to +85C". It's funny how many times you have changed the specs. I especially enjoyed the time when you changed the power output specs three times in one week after you were caught fabricating them instead of actually measuring them. Oh well, such is the life of an internet-educated hack. But alas, there's still one unresolved issue here, Brian.... where's the schematic? |
What happened to the SkyWave 2879ABTC?
On Sep 20, 10:48 pm, Frank Gilliland
wrote: On Thu, 20 Sep 2007 17:08:23 -0700, Telstar Electronics wrote in . com: On Sep 20, 3:03 pm, wrote: Oh...your bias is magical? It uses no components for compensation? I always suspected your design to be that of an imaginary nature. Not magical... it used the base-emitter voltage drop of an MJE3055T (mounted directly to heat sink) to track with the 2SC2879 power transistors. Since it used a transistor with gain... it worked so much better than just a plain old diode on the sink for tracking. It worked fantastic... How well it works depends on how well you hacked the design from this link I posted (while pointing out some of the many problems with your earlier splatterbox): http://www.ifwtech.co.uk/g3sek/tr-bias/tr-bias1.htm I was able to set set class AB bias ( I chose about 200Ma) on the power transistors... and hold +/-5% collector current changes from -40 to +100C heat sink temp during amp operation. That's interesting. Previously you said your bias scheme can "hold the 500mA bias to 10% from -30 to +85C". It's funny how many times you have changed the specs. I especially enjoyed the time when you changed the power output specs three times in one week after you were caught fabricating them instead of actually measuring them. Oh well, such is the life of an internet-educated hack. But alas, there's still one unresolved issue here, Brian.... where's the schematic? Glad you're back Frank... your always good for a laugh. www.telstar-electronics.com |
Telstar Electronics VoiceMax IS GARBAGE!
On Sep 19, 11:42 am, Deek wrote:
I conclude that the VOICEMAX issue has died, has had the funeral and now should be buried. Those who advocate high distortion levels and poor quality signals can spend their $$$ and buy it. That's just what the average cber wants. Makes em think they got a "BIG RADIO". |
What happened to the SkyWave 2879ABTC?
On Fri, 21 Sep 2007 07:37:54 -0700, Telspam Electronics
wrote in .com: On Sep 20, 10:48 pm, Frank Gilliland wrote: On Thu, 20 Sep 2007 17:08:23 -0700, Telstar Electronics wrote in . com: On Sep 20, 3:03 pm, wrote: Oh...your bias is magical? It uses no components for compensation? I always suspected your design to be that of an imaginary nature. Not magical... it used the base-emitter voltage drop of an MJE3055T (mounted directly to heat sink) to track with the 2SC2879 power transistors. Since it used a transistor with gain... it worked so much better than just a plain old diode on the sink for tracking. It worked fantastic... How well it works depends on how well you hacked the design from this link I posted (while pointing out some of the many problems with your earlier splatterbox): http://www.ifwtech.co.uk/g3sek/tr-bias/tr-bias1.htm I was able to set set class AB bias ( I chose about 200Ma) on the power transistors... and hold +/-5% collector current changes from -40 to +100C heat sink temp during amp operation. That's interesting. Previously you said your bias scheme can "hold the 500mA bias to 10% from -30 to +85C". It's funny how many times you have changed the specs. I especially enjoyed the time when you changed the power output specs three times in one week after you were caught fabricating them instead of actually measuring them. Oh well, such is the life of an internet-educated hack. But alas, there's still one unresolved issue here, Brian.... where's the schematic? Glad you're back Frank... I never left, Brian. your always good for a laugh. I'm glad you're amused. But don't you think it's time for you to get a job and relieve the financial burden on your parents and the Illinois welfare system? If I lived in that state I would be outraged that you are leeching my hard-earned tax dollars, but I don't. I guess people over there prefer to coddle malingering basement-dwellers. You are certainly lucky to live in a place with such generous folks, Brian. Over here on the left coast you would have to support yourself with gainful employment. And I hope that gives you something else to laugh about, cause the thought of you actually working for your keep sure leaves -me- ROTFLMMFAO!!! BTW, where's that schematic? |
What happened to the SkyWave 2879ABTC?
On Sep 21, 11:45 pm, Frank Gilliland
wrote: On Fri, 21 Sep 2007 07:37:54 -0700, Telspam Electronics wrote in .com: On Sep 20, 10:48 pm, Frank Gilliland wrote: On Thu, 20 Sep 2007 17:08:23 -0700, Telstar Electronics wrote in . com: On Sep 20, 3:03 pm, wrote: Oh...your bias is magical? It uses no components for compensation? I always suspected your design to be that of an imaginary nature. Not magical... it used the base-emitter voltage drop of an MJE3055T (mounted directly to heat sink) to track with the 2SC2879 power transistors. Since it used a transistor with gain... it worked so much better than just a plain old diode on the sink for tracking. It worked fantastic... How well it works depends on how well you hacked the design from this link I posted (while pointing out some of the many problems with your earlier splatterbox): http://www.ifwtech.co.uk/g3sek/tr-bias/tr-bias1.htm I was able to set set class AB bias ( I chose about 200Ma) on the power transistors... and hold +/-5% collector current changes from -40 to +100C heat sink temp during amp operation. That's interesting. Previously you said your bias scheme can "hold the 500mA bias to 10% from -30 to +85C". It's funny how many times you have changed the specs. I especially enjoyed the time when you changed the power output specs three times in one week after you were caught fabricating them instead of actually measuring them. Oh well, such is the life of an internet-educated hack. But alas, there's still one unresolved issue here, Brian.... where's the schematic? Glad you're back Frank... I never left, Brian. your always good for a laugh. I'm glad you're amused. But don't you think it's time for you to get a job and relieve the financial burden on your parents and the Illinois welfare system? If I lived in that state I would be outraged that you are leeching my hard-earned tax dollars, but I don't. I guess people over there prefer to coddle malingering basement-dwellers. You are certainly lucky to live in a place with such generous folks, Brian. Over here on the left coast you would have to support yourself with gainful employment. And I hope that gives you something else to laugh about, cause the thought of you actually working for your keep sure leaves -me- ROTFLMMFAO!!! BTW, where's that schematic?- Hide quoted text - - Show quoted text - Keep up the amusing posts Frank... www.telstar-electronics.com |
What happened to the SkyWave 2879ABTC?
On Sep 20, 10:48 pm, Frank Gilliland
wrote: How well it works depends on how well you hacked the design from this link I posted (while pointing out some of the many problems with your earlier splatterbox): http://www.ifwtech.co.uk/g3sek/tr-bias/tr-bias1.htm This is the first time I've been to that link. The circuit he shows with the two transistors is similar to mine. My feeling is that his is needlessly more complex, but I'm sure it works. I also agree with his statements about the diode method used for tracking. That method works a little better than no tracking and is not worth the effort. This is because putting two diodes in parallel never works right. One always has a lower drop... and hogs. www.telstar-electronics.com |
What happened to the SkyWave 2879ABTC?
Telstar Electronics wrote:
... Keep up the amusing posts Frank... www.telstar-electronics.com Personally, I run a speech compressor. I doubt many of these idiots could install one; apparently, they can't afford to have the local "cb tweak" install if for them either. Local, I kill the speech compressor, it is only for DX. Frankly, it doesn't hurt my feelings they don't have one! evil grin Keep up the sales pitch--few will be disappointed if they purchase one ... Regards, JS |
Telstar Electronics VoiceMax IS GARBAGE!
cmdr buzz corey wrote:
... That's just what the average cber wants. Makes em think they got a "BIG RADIO". Well, that is certainly better than a "Big-Headed-Amateur-Wannabe!" Get mental help, the opportunity is still open to 'ya! JS |
What happened to the SkyWave 2879ABTC?
On Sep 22, 3:16 pm, John Smith wrote:
Personally, I run a speech compressor. I doubt many of these idiots could install one; apparently, they can't afford to have the local "cb tweak" install if for them either. Local, I kill the speech compressor, it is only for DX. Frankly, it doesn't hurt my feelings they don't have one! evil grin Keep up the sales pitch--few will be disappointed if they purchase one ... John... good to hear from someone who has some experience with processors. I'm curious about the one you have. Can you tell me about it? www.telstar-electrnoics.com |
What happened to the SkyWave 2879ABTC?
On Sat, 22 Sep 2007 08:26:46 -0700, Telstar Electronics
wrote in om: On Sep 20, 10:48 pm, Frank Gilliland wrote: How well it works depends on how well you hacked the design from this link I posted (while pointing out some of the many problems with your earlier splatterbox): http://www.ifwtech.co.uk/g3sek/tr-bias/tr-bias1.htm This is the first time I've been to that link. Yeah, bull****. I've posted it four times over the years, and I'm sure you've run across it in your quest for hackable designs. The circuit he shows with the two transistors is similar to mine. Gee, what a suprise. My feeling is that his is needlessly more complex, but I'm sure it works. Let's see -your- design, Brian. I also agree with his statements about the diode method used for tracking. That method works a little better than no tracking and is not worth the effort. Yet you used it in your previous amps. You even defended the design, which is when I posted the link above. It wasn't long afterwards that you came up with your last hack job. This is because putting two diodes in parallel never works right. One always has a lower drop... and hogs. I don't see two diodes in parallel. Time to lay off the sauce, Brian. |
What happened to the SkyWave 2879ABTC?
On Sep 23, 4:34 am, Frank Gilliland
wrote: I also agree with his statements about the diode method used for tracking. That method works a little better than no tracking and is not worth the effort. Yet you used it in your previous amps. You even defended the design, which is when I posted the link above. It wasn't long afterwards that you came up with your last hack job. This is because putting two diodes in parallel never works right. One always has a lower drop... and hogs. I don't see two diodes in parallel. Time to lay off the sauce, Brian. Frank... I didn't say the diode scheme didn't work... I said it didn't work well. Actaually, the Motorola RF Data Manual shows this scheme in many of their designs... so maybe you give them a call and let them know how foolish they are... lol But seriously, the diode thing isn't worth the trouble unless you are willing to hand-select components that go alaong with that circuit. Even then, it's certainly not the best method. By the way... the diode tracking scheme does try and use two diodes in parallel. Sorry you don't see that... but that's how it is... and why it doesn't work well. www.telstar-electronics.com |
What happened to the SkyWave 2879ABTC?
On Sun, 23 Sep 2007 06:06:02 -0700, Telspam Electronics
wrote in . com: On Sep 23, 4:34 am, Frank Gilliland wrote: I also agree with his statements about the diode method used for tracking. That method works a little better than no tracking and is not worth the effort. Yet you used it in your previous amps. You even defended the design, which is when I posted the link above. It wasn't long afterwards that you came up with your last hack job. This is because putting two diodes in parallel never works right. One always has a lower drop... and hogs. I don't see two diodes in parallel. Time to lay off the sauce, Brian. Frank... I didn't say the diode scheme didn't work... I said it didn't work well. Actaually, the Motorola RF Data Manual shows this scheme in many of their designs... so maybe you give them a call and let them know how foolish they are... lol But seriously, the diode thing isn't worth the trouble unless you are willing to hand-select components that go alaong with that circuit. Even then, it's certainly not the best method. By the way... the diode tracking scheme does try and use two diodes in parallel. Sorry you don't see that... but that's how it is... and why it doesn't work well. I checked the page again thinking maybe it changed, but I still don't see two diodes. Just one. What two diodes are -you- seeing, Brian? |
What happened to the SkyWave 2879ABTC?
On Sep 24, 4:35 am, Frank Gilliland
wrote: I checked the page again thinking maybe it changed, but I still don't see two diodes. Just one. What two diodes are -you- seeing, Brian?- Hide quoted text - You're kidding me right?... the external tracking diode (one) and the base-emitter diode of the power transistor (two). Got it? www.telstar-electronics.com |
What happened to the SkyWave 2879ABTC?
Telstar Electronics wrote:
On Sep 24, 4:35 am, Frank Gilliland wrote: I checked the page again thinking maybe it changed, but I still don't see two diodes. Just one. What two diodes are -you- seeing, Brian?- Hide quoted text - You're kidding me right?... the external tracking diode (one) and the base-emitter diode of the power transistor (two). Got it? www.telstar-electronics.com ==================================== What a totally useless dialogue on a topic not relevant to this NG Would you please find another outlet for your egos. Frank GM0CSZ / KN6WH |
What happened to the SkyWave 2879ABTC?
On Sep 24, 6:25 am, Highland Ham
wrote: What a totally useless dialogue on a topic not relevant to this NG Would you please find another outlet for your egos. Frank GM0CSZ / KN6WH Hmmm... a discussion about the biasing of an RF amplifier is not relevant to this NG huh? Find another outlet for your complaints... lol |
What happened to the SkyWave 2879ABTC?
Telstar Electronics wrote:
On Sep 24, 6:25 am, Highland Ham wrote: What a totally useless dialogue on a topic not relevant to this NG Would you please find another outlet for your egos. Frank GM0CSZ / KN6WH Hmmm... a discussion about the biasing of an RF amplifier is not relevant to this NG huh? Find another outlet for your complaints... lol Please quit cross posting this to 'rec.radio.amateur.homebrew'; this _clearly_ is not a homebrewing discussion. Regards, Michael |
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