[Boatanchors] [Kenwood] Kenwood TS-530SP

[KA2PTE]

Welcome Howard

Im working on a plain 530 now, I replaced the 56K's , all the 470K's....
the 680K's are I think droppers to the panel meter for the voltage mode,
they are usually ok as is the 12/15K and the 1K so I left those alone.

The tube socket solder usually is cracked somewhat, good idea to add solder 
to them,
reflow and you will probably note the philips screws on that board are 
somewhat loose.
They squish down solder grounds, and over time they loosen and you can 
develop poor grounds
on the board. I tighten them and place lock washers on them.

Also while there, measure with an om-meter the cathode resistors from ground 
to where pins 1-4-6
tie together in the center with the foil. Should read 5 ohms.

If any higher than that, replace all the 20 ohm cathode resistors. The one I 
am doing
reads 7 ohms and I had noticed it was tending to draw more than usual plate 
current
when dipping. So I will be replacing them.

--
Steve Hearns [ KA2PTE ]



----- Original Message ----- 
From: "howard holden" <holden7471 at msn.com>
To: <boatanchors at mailman.qth.net>; "KA2PTE" <ka2pte at 3950.net>
Sent: Monday, September 16, 2024 12:01 PM
Subject: Re: [Boatanchors] [Kenwood] Kenwood TS-530SP


Thanks again Steve! I've been "bitten" many times over my 63 years at this 
game. Keeping a record of what you write. I'll get to this stuff later today 
maybe.