View Single Post
Old 25th Jan 2022, 11:59 pm   #14
Radio Wrangler
Moderator
 
Radio Wrangler's Avatar
 
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 22,800
Default Re: FT101ZD MkIII Low output power on high bands

Quote:
Originally Posted by rjmusto View Post
Hi David,
It’s branded Sylvania.
Is that good or bad?
The FT101 family have the RF preselector ganged to the driver tuning. They were set at the design stage to track properly with a Toshiba driver valve. Other makes have slightly different stray capacitances and as a result if you peak the preselector on receive, the transmitter winds up a bit off song and it costs you power, worse on the upper bands.

It might be this old issue, but no guarantees.

David
__________________
Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done
Radio Wrangler is offline