i would replace C20 with one of these: https://www.rfparts.com/468.html
why is your input SWR so high?
LC
I use Arco variables in my builds but I think a lot of TS owners and repair places frown on leaving an Arco in place. I think they like to use them to find the exact value for that specific build than install fixed value silver dipped mica's in it's place once they have the value. Use a non-conductive sealant that can be removed later on.
not sure why people frown on leaving the trimmer in place.
It's not like there haven't been many linear amps designed and built with trimmers.
I'm always open to learning something new though.
one thing on using the trimmer; before installing it, use an ohmmeter to determine which solder lug is connected to the screw head that will be adjusted.
This is the end of the trimmer that you should put towards ground.
That way you won't detune the circuit by using a tool on the screw head.
groundwire, you stated that you now have a 1.4 SWR going into the amp (which BTW, many of us find perfectly acceptable) and then you stated that this equaled a 5 watt reflect.
exactly how many watts are you putting into this amp?
one other thing to put out there just in case. don't forget to look at the power coming out of the amp while you are tuning the input.
LC
groundwire, you stated that you now have a 1.4 SWR going into the amp (which BTW, many of us find perfectly acceptable) and then you stated that this equaled a 5 watt reflect.
exactly how many watts are you putting into this amp?
LC
groundwire, you stated that you now have a 1.4 SWR going into the amp (which BTW, many of us find perfectly acceptable) and then you stated that this equaled a 5 watt reflect.
exactly how many watts are you putting into this amp?
LC