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Well, do you remember my last post about that VHF solid state amp?. I emailed Henry radio asking for data about the transistors and if possible a circuit schematic. I think it was 5' later I received the answer to my questions, they also offer to mail me the manual. That's fast and good service.

Best regards
Guillermo - LU8EYW.

Guillermo,

Yes, I remember. I wanted to tell you that the resistors off the base
to ground are correct, and most likely are 10 ohm carbon comp type.
However, I've never seen one base of one transistor tied to another
transistors base with a resistor. Are these transistors in parallel or
the standard two in push-pull? I can't see that at all in a push-pull
circuit, just the 10 ohm to ground off each transistor. That is part
of the bias circuit. I'm wondering if someone was playing around in it
not knowing what they were doing to be honest.

Best,

Will


--- In ham_amplifiers@..., GGLL <nagato@...> wrote:

Well, do you remember my last post about that VHF solid state amp?.

I emailed

Henry radio asking for data about the transistors and if possible a

circuit

schematic. I think it was 5' later I received the answer to my

questions, they

also offer to mail me the manual. That's fast and good service.

Best regards
Guillermo - LU8EYW.

--- In ham_amplifiers@..., GGLL <nagato@...> wrote:

Well, do you remember my last post about that VHF solid state

amp?. I emailed

Henry radio asking for data about the transistors and if possible a

circuit

schematic. I think it was 5' later I received the answer to my

questions, they

also offer to mail me the manual. That's fast and good service.

Best regards
Guillermo - LU8EYW.

Please share your findings with the group.
Thanks,
Phil, K5PC

Phil Clements escribi:

--- In ham_amplifiers@..., GGLL <nagato@...> wrote:

Well, do you remember my last post about that VHF solid state

amp?. I emailed

Henry radio asking for data about the transistors and if possible a

circuit

schematic. I think it was 5' later I received the answer to my

questions, they

also offer to mail me the manual. That's fast and good service.

Best regards
Guillermo - LU8EYW.

Please share your findings with the group.
Thanks,
Phil, K5PC

Yes, Phil, I'll do that; I always heard the owner was called Ted Henry, is this ok?. The answers in all cases were signed by a man called Ted Shannon Henry, so I guess if not a son or relative, the owner itself!.
By the way, he said me he not recall the CD 4778 as used in that linear, but 2N6084 instead.
That reinforce my idea of a previous owner fix, although the person who might changed the transistor did an excellent job, all transistor solder look as original.

Best regards
Guillermo - LU8EYW.