Scott in Baltimore wrote:

Those are VHF rated transistors. Does it have the traditional
BB matching xformers or is it TRF circuits?


no xformers on the board. Excuse my ignorance but what is a TRF circuit?


Tuned Radio Frequency.

The input and output circuits are fixed in one small range.
Capacitors and inductors only have certain values at certain
frequencies. At others, the match is very poor.

Maybe the amp is designed for another frequency.

Amps with broadband matching transformers will work over
serveral decades of range. Most active devices will output
more at lower frequencies.
It was designed for 11 meters as I have used it with great success. It
would xmit the roger beep but no audio.

"jim" wrote in message
...
Scott in Baltimore wrote:

Those are VHF rated transistors. Does it have the traditional
BB matching xformers or is it TRF circuits?


no xformers on the board. Excuse my ignorance but what is a TRF circuit?


Tuned Radio Frequency.

The input and output circuits are fixed in one small range.
Capacitors and inductors only have certain values at certain
frequencies. At others, the match is very poor.

Maybe the amp is designed for another frequency.

Amps with broadband matching transformers will work over
serveral decades of range. Most active devices will output
more at lower frequencies.
It was designed for 11 meters as I have used it with great success. It
would xmit the roger beep but no audio.

If it transmits the roger beep then its not the amp. Sounds like the radio
has a modulation problem.

DrDeath wrote:

"jim" wrote in message
...

Scott in Baltimore wrote:


Those are VHF rated transistors. Does it have the traditional
BB matching xformers or is it TRF circuits?


no xformers on the board. Excuse my ignorance but what is a TRF circuit?


Tuned Radio Frequency.

The input and output circuits are fixed in one small range.
Capacitors and inductors only have certain values at certain
frequencies. At others, the match is very poor.

Maybe the amp is designed for another frequency.

Amps with broadband matching transformers will work over
serveral decades of range. Most active devices will output
more at lower frequencies.

It was designed for 11 meters as I have used it with great success. It
would xmit the roger beep but no audio.


If it transmits the roger beep then its not the amp. Sounds like the radio
has a modulation problem.


The radio works fine. In fact one of the frequent posters on this ng
(other than myself obviously) now uses it. Its definitely the amp.

jim wrote:
The radio works fine. In fact one of the frequent posters on this ng
(other than myself obviously) now uses it. Its definitely the amp.

Who?

Steveo wrote:

jim wrote:

The radio works fine. In fact one of the frequent posters on this ng

(other than myself obviously) now uses it. Its definitely the amp.


Who?
hehehe thought you'd pop in.