[Amps] 144 MHz GS35B update

[donroden at hiwaay.net]

Good Job !!

Don W4DNR

Quoting N1BUG <paul at n1bug.com>:

> 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
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps



DonR