On 10 Sep 2006 10:19:40 -0700, "Telstar Electronics"
wrote in
m:

Lancer wrote:
Please explain your multiplexed keying capabilities...

Aside from the usual COR (carrier operated relay) switching, the
multiplexed keying capability is designed into the SkyWave 2879AB (and
soon to be released 2879ABTC). It allows the user to "hard" key the
amplifier as soon as the mic button is pushed... regardless of what
mode they're transmitting in, with no additional wiring. This is done
with a simple modification to the radio. Email me, and I will send you
the information in the form of a PDF file.


Instead of unbalancing your balanced modulator (and thus defeating two
of the benefits of SSB), why not run a key line along side the coax?
After all, you gotta connect the two with coax anyway, right? Just use
the external speaker jack to route it out the radio. Or, if the extra
wire is too expensive, how about modifying the radio to superimpose a
DC keying signal onto the coax that can be detected by the amp? Even
better, and since most amps are mounted close to the radio, how about
including a couple mic jacks in the amp; one for the mic and the other
for a patch cable between the amp and the radio's mic jack? The latter
could even be used with the hard-line remote keying system mentioned
earlier.

All are much better solutions than detuning the radio.

Frank Gilliland wrote:
Or, if the extra
wire is too expensive, how about modifying the radio to superimpose a
DC keying signal onto the coax that can be detected by the amp?

This is exactly how the "multiplexed switching "capabilities of the
SkyWave amplifiers work...

www.telstar-electronics.com

"Telstar Electronics" wrote in
ups.com:


Frank Gilliland wrote:
Or, if the extra
wire is too expensive, how about modifying the radio to superimpose a
DC keying signal onto the coax that can be detected by the amp?

This is exactly how the "multiplexed switching "capabilities of the
SkyWave amplifiers work...

www.telstar-electronics.com



I was wondering what you had meant my multiplexed. I've been to that with
my UHF and microwave amplifiers for years, external keying.

SC

On 11 Sep 2006 03:01:49 -0700, "Telstar Electronics"
wrote in
. com:


Frank Gilliland wrote:
Or, if the extra
wire is too expensive, how about modifying the radio to superimpose a
DC keying signal onto the coax that can be detected by the amp?

This is exactly how the "multiplexed switching "capabilities of the
SkyWave amplifiers work...


But I thought you said the modification required "no additional
wiring"?

On a sunny day (Sun, 10 Sep 2006 19:21:59 -0700) it happened Frank Gilliland
wrote in
:

Instead of unbalancing your balanced modulator (and thus defeating two
of the benefits of SSB),

Is he doing that? You must be joking right? I do not believe he does that?

why not run a key line along side the coax?
After all, you gotta connect the two with coax anyway, right? Just use
the external speaker jack to route it out the radio. Or, if the extra
wire is too expensive, how about modifying the radio to superimpose a
DC keying signal onto the coax that can be detected by the amp? Even
better, and since most amps are mounted close to the radio, how about
including a couple mic jacks in the amp; one for the mic and the other
for a patch cable between the amp and the radio's mic jack?

Sure, use the mike connector, I have this interface anyways for packet radio
(digital), cost only 3 connectors and 1 meter wire.
But then he needs different connectors for different types of sets.
And it takes some soldering.
Could sell it as : Adapter, gold plated? adapters is big business.....

Well I think that anyways after I have seen a gold plated audio cable for 100$
in a shop here ;-)

Well, finished the testing of the temperature compensated biasing on
the new amplifier. It works as well as the original "hay-wired"
prototype I first made. I think the cicuit is very repeatable. I was
able to hold a 500mA collector current bias to +/-50mA from -30 to
+85C. Without the compensation, the variance over that temperature
range is about 4 to 5 Amps. I'm now in the process of evaluating the RF
performance... and then some life testing. If anyone is curious... the
preliminary specs are available for viewing at
http://www.telstar-electronics.com/S...202879ABTC.pdf

www.telstar-electronics.com

On 11 Sep 2006 04:40:18 -0700, "Telstar Electronics"
wrote in
. com:

Well, finished the testing of the temperature compensated biasing on
the new amplifier......


......blah, blah, blah. Quit spamming the group and start a blog.

On 11 Sep 2006 04:40:18 -0700, "Telstar Electronics"
wrote in
Well, finished the testing of the temperature compensated biasing on
the new amplifier......

Frank Gilliland wrote:
.....blah, blah, blah. Quit spamming the group and start a blog.

That's not spam Frank... it's an update. Guess you don't know the
difference. You never were too bright... LOL

www.telstar-electronics.com

"Telstar Electronics" wrote in message
ups.com...
On 11 Sep 2006 04:40:18 -0700, "Telstar Electronics"
wrote in
Well, finished the testing of the temperature compensated biasing on
the new amplifier......

Frank Gilliland wrote:
.....blah, blah, blah. Quit spamming the group and start a blog.

That's not spam Frank... it's an update. Guess you don't know the
difference. You never were too bright... LOL


RighteeO, Mr. 3ft X 3ft ground plane man. LOL!!!

"Telstar Electronics" wrote in message
ups.com...
On 11 Sep 2006 04:40:18 -0700, "Telstar Electronics"
wrote in
Well, finished the testing of the temperature compensated biasing on
the new amplifier......

Frank Gilliland wrote:
.....blah, blah, blah. Quit spamming the group and start a blog.

That's not spam Frank... it's an update. Guess you don't know the
difference. You never were too bright... LOL



Frank has it right. Anytime you post it's either spam or you fOaming at the
mouth.

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