Frank Gilliland wrote:
http://www.ifwtech.co.uk/g3sek/tr-bias/tr-bias1.htm

Thanks Frank for posting this link. It supports what I've been saying
all along about the plain-old diode method working like crap. So why
don't you go ahead and use that method on your new amp... LOL

www.telstar-electronics.com

On 27 Sep 2006 03:05:16 -0700, "Telstar Electronics"
wrote in
om:

Frank Gilliland wrote:
http://www.ifwtech.co.uk/g3sek/tr-bias/tr-bias1.htm

Thanks Frank for posting this link.


No problem.


It supports what I've been saying
all along about the plain-old diode method working like crap.


The diode method works, it's just not idiot-proof so it's no good for
a production CB amp. So why didn't you incorporate the concept in your
earlier amps instead of vehemently defending your no-bias Class C POS
by claiming that "linearity is not required for SSB"?


So why
don't you go ahead and use that method on your new amp... LOL


Naw, I have a better system.

Frank Gilliland wrote:
The diode method works, it's just not idiot-proof so it's no good for
a production CB amp.

Well, I claim it doesn't work... unless you want to tell me how you can
parallel two diodes together... without any ballasting... and have both
of them turned on. That's essentially what that circuit is doing.
Unlike you... I have certainly tried it before. It doesn't work... for
the reason I stated.

http://search.ebay.com/_W0QQfgtpZ1QQ...Q2delectronics

On 27 Sep 2006 04:42:20 -0700, "Telstar Electronics"
wrote in
om:


Frank Gilliland wrote:
The diode method works, it's just not idiot-proof so it's no good for
a production CB amp.

Well, I claim it doesn't work... unless you want to tell me how you can
parallel two diodes together... without any ballasting... and have both
of them turned on. That's essentially what that circuit is doing.


No, it's not. I explained this before but apparently it flew over your
head. So I'll try to make it a bit simpler for you: Instead of having
a single diode checking the heat of two transistors, this guy used one
diode on -each- transistor. They may be wired in parallel but they are
-not- expected to work at the same time. Why? Because the bias will be
fixed by the diode with the lowest Vf, which will be the hotter of the
two diodes (Vf decreases as temperature increases).


Unlike you... I have certainly tried it before. It doesn't work... for
the reason I stated.


Well Brian, I -have- used the circuit before, in several different
variations, and yes it -does- work.

Frank Gilliland wrote:
Well Brian, I -have- used the circuit before, in several different
variations, and yes it -does- work.

Then show me the circuit that worked.

http://search.ebay.com/_W0QQfgtpZ1QQ...Q2delectronics

On 27 Sep 2006 05:38:27 -0700, "Telstar Electronics"
wrote in
om:

Frank Gilliland wrote:
Well Brian, I -have- used the circuit before, in several different
variations, and yes it -does- work.

Then show me the circuit that worked.


Regarding the parallel circuit, I'll save myself the effort of digging
the scanner out of the closet; Here are a couple literary references
from my bookshelf that you can probably dig up at your local library.
Both of them have circuits that utilize the same parallel arrangement
in one form or another:

Motorola Power Transistor Handbook, 1961 (and probably other years)
(see section on power inverters)

Electronic Circuit Design Handbook, EEE Magazine, 1971-74 (several
different circuits in various sections)

If you can't find those books, can't find any references yourself, and
can't figure out how to set up a simple test circuit to verify its
operation, let me know in a month or so when the weather goes sour and
I'll have more time to spend on your education.

wrote in
Then show me the circuit that worked.


Frank Gilliland wrote:
Regarding the parallel circuit, I'll save myself the effort of digging
the scanner out of the closet; Here are a couple literary references
from my bookshelf that you can probably dig up at your local library.
Both of them have circuits that utilize the same parallel arrangement
in one form or another:

Motorola Power Transistor Handbook, 1961 (and probably other years)
(see section on power inverters)

Electronic Circuit Design Handbook, EEE Magazine, 1971-74 (several
different circuits in various sections)

If you can't find those books, can't find any references yourself, and
can't figure out how to set up a simple test circuit to verify its
operation, let me know in a month or so when the weather goes sour and
I'll have more time to spend on your education.

No, don't want to see those. I want to see the exact circuit that you
said you tried and it worked.

www.telstar-electronics.com

On Wed, 27 Sep 2006 05:10:56 -0700, Frank Gilliland
wrote in
:

On 27 Sep 2006 04:42:20 -0700, "Telstar Electronics"
wrote in
. com:


Frank Gilliland wrote:
The diode method works, it's just not idiot-proof so it's no good for
a production CB amp.

Well, I claim it doesn't work... unless you want to tell me how you can
parallel two diodes together...


Guess what, Brian? I took a closer look at the pic and it turns out
the diodes are IN SERIES! Doesn't matter tho, because as I was
browsing the other photos it appears that the amp has a seperate bias
regulator circuit that was added and is controlled by the Vf of the
two diodes in series, which is an even better method.