[Amps] 144 MHz GS35B update

[Paul Baldock]

Take one more turn off and you could probably get 600W out with 0W drive.

- Paul



At 01:50 PM 5/1/2017, N1BUG wrote:
>There we go. After reviewing pictures of several other amplifiers 
>using this tube I removed one more turn from the coil on the tube 
>side of the T match. Input SWR is 1:1 and the amp is making over 600 
>watts out with 25 watts in. I plan to run it this way for a while 
>before I go for the real QRO.
>
>Paul
>
>
>On 05/01/2017 02:40 PM, N1BUG wrote:
>>I'm seeing more RF output with the new configuration, about 500W for
>>somewhere around 25W drive. It appears I am going to have some fun
>>getting the input SWR down but I guess everyone does. That's
>>probably why there are so many slight variations on coil dimensions
>>among the various plans.
>>
>>My first try with both coils having 5 turns 15mm ID, 20mm long
>>resulted in minimum SWR of 3:1. My second try with 4 turns 15mm ID,
>>20mm long got it down to about 2.6:1. I am not sure whether to take
>>another turn off both coils or perhaps just the one on the tube
>>side. Many pictures of amps I have seen appeared to have less L on
>>the tube side although I don't see this mentioned in any
>>accompanying text.
>>
>>Paul
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