[Boatanchors] [Kenwood] Kenwood TS-530SP

[howard holden]

Thanks again Steve, much appreciated! Understand about the neutralizing.

Howie

________________________________________
From: boatanchors-bounces at mailman.qth.net <boatanchors-bounces at mailman.qth.net> on behalf of KA2PTE <ka2pte at 3950.net>
Sent: Monday, September 16, 2024 11:47 AM
To: boatanchors at mailman.qth.net
Subject: Re: [Boatanchors] [Kenwood] Kenwood TS-530SP

Yes, the SG switch kills power to the screen grids pretty much
turning the final tubes off.

Thats done when neutralizing the final tubes, if you replace the tubes with
different ones always neutralize them. If I see the power out is maybe a
little on the low
side and the radio was not used in a long while, I will re-neutralize just
while I am in there.

So as long as you set the idle current in xmit in SSB to 60mA with no audio
thru the mike
the finals sound like they are all read to go.

When the radio is only used on certain bands, those sections on the
bandswitch need cleaning, as they
are not used so maybe they never used them that much.

If set to TUNE mode, and xmit, the drive control should get you around 75%
or more ALC reading when
in tune to the VFO freq. Coil pack alignment will improve that sometimes.

Make sure the CAR knob is fully CW. ALC tends to fall a bit as you go up in
bands, 10M is most noticable
and you always need full CAR when up there.

--
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 1:55 PM
Subject: Re: [Boatanchors] [Kenwood] Kenwood TS-530SP


Problem mostly solved! Many thanks to all who offered suggestions! Wally G
was right, it was a "duh" moment indeed, the switch on the rear panel (the
screen grid on-off switch) that was the culprit. I think the manual says
something about that too. Gotta go back and re-read that. Still no ALC nor
drive on 1.8, 18, and 24Mhz but that's most likely a cleaning issue or as
Steve said the coupler has slipped. Gonna also work on Steve's suggestions
on resistor replacements. By the way, for Rob, the bleeders on the HV caps
are 470K in series, so I would definitely expect a slow drop in the plate
voltage. All very much appreciated! We are NEVER too old to learn a thing or
two.

Thanks and 73, Howie WB2AWQ

________________________________________
From: boatanchors-bounces at mailman.qth.net
<boatanchors-bounces at mailman.qth.net> on behalf of KA2PTE <ka2pte at 3950.net>
Sent: Monday, September 16, 2024 9:18 AM
To: boatanchors at mailman.qth.net
Subject: Re: [Boatanchors] [Kenwood] Kenwood TS-530SP

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.


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