rec.antiques.radio+phono Google Group

Re: and I LAUGHED when I saw this....

unrevealed_sou...@nospam.com (Unrevealed Source) — Fri, 08 Jan 2010 01:04:54 UT

I've bid one dollar.
Jeff

Re: Zenith Oriental console cabinet

farside...@hotmail.com (Buck Frobisher) — Fri, 08 Jan 2010 00:40:20 UT

---- Original Message -----
Newsgroups: rec.antiques.radio+phono
Sent: Thursday, January 07, 2010 11:43 AM
I remember that lobby, and visited it several times in the mid-80s. I was
in chaarge of buying for a chain of 200 TV/audio stores in Canada at that
time, and we had several trips to Zenith H.O. to talk to the sales people.

Re: QUESTIONS ABOUT RESISTORS IN TUBE RADIOS

jan...@suddenlink.net (Jeffrey D Angus) — Thu, 07 Jan 2010 23:12:44 UT

buzz wrote:
Are you purposely being stubborn?
I, as a rule, replace all the paper caps and electrolytics
BEFORE I even apply power to a set. It either deserves being
done right, or it goes in the trash, on the bone pile or off
to someone else who wants it.
While I'm at it, I check all the resistors and replace the

Re: QUESTIONS ABOUT RESISTORS IN TUBE RADIOS

dpeterm...@worldnet.att.net (D. Peter Maus) — Thu, 07 Jan 2010 22:39:45 UT

She'd BETTER have been.

Re: QUESTIONS ABOUT RESISTORS IN TUBE RADIOS

dpeterm...@worldnet.att.net (D. Peter Maus) — Thu, 07 Jan 2010 22:29:30 UT

Actually it's a pretty good one.
Same thing with my Ferrari. Belts, idlers, and the water pump
because it was SUCH a PITA to get at. If you were in there, do it
all. Head gaskets, valve seals...the parts list was two pages.
Tune ups were nearly rebuilds.

Re: QUESTIONS ABOUT RESISTORS IN TUBE RADIOS

comce...@comcents.com (Randy) — Thu, 07 Jan 2010 22:26:22 UT

On Thu, 07 Jan 2010 13:58:19 -0600, "D. Peter Maus"
Are you certain he was talking about the car? (big grin!)
best!
rg

Re: QUESTIONS ABOUT RESISTORS IN TUBE RADIOS

comce...@comcents.com (Randy) — Thu, 07 Jan 2010 22:21:51 UT

And in cars as well... race engines are routinely rebuilt; and it's
not uncommon for an engine to be "gone through" while undergoing
somewhat routine maintenance. For instance - many (most) modern
engines use a belt instead of chain for the cam - unlike a chain they
need to be regularly replaced. Honda engines are a prime example...

Re: QUESTIONS ABOUT RESISTORS IN TUBE RADIOS

dpeterm...@worldnet.att.net (D. Peter Maus) — Thu, 07 Jan 2010 20:50:41 UT

No one is suggesting replacing ALL resistors on an old radio,
just because. But, what IS being suggested, is replacing resistors
that are bad as measured, that are bad by performance, are
discolored, or are historically likely to be bad.
I do the same thing. Damned near every time.
I have a Webster wire recorder I couldn't get a decent level out

Re: QUESTIONS ABOUT RESISTORS IN TUBE RADIOS

b...@nowhere.com (buzz) — Thu, 07 Jan 2010 20:30:57 UT

Replacing all the resistors on an old radio just because, makes as much
sense as putting braces on false teeth.

Re: QUESTIONS ABOUT RESISTORS IN TUBE RADIOS

b...@nowhere.com (buzz) — Thu, 07 Jan 2010 20:27:22 UT

So you change all the resistors every time, right?

Re: Rec.antiques.radio+phono FAQ, Charter, Group Life, Basic Questions

comce...@comcents.com (Randy) — Thu, 07 Jan 2010 20:26:16 UT

(and documented) opinion on the "sell or not to sell here" issue...
To which I'll merely add:
Hear! Hear! Bravo! well said. Please people... consider his
comments well.
kindest regards...
rg...

Re: QUESTIONS ABOUT RESISTORS IN TUBE RADIOS

dpeterm...@worldnet.att.net (D. Peter Maus) — Thu, 07 Jan 2010 19:58:19 UT

Because it's so common, Jeff.
There are a lot of hacks out there. Professional hacks, at that.
The level of service you're speaking of is thorough, and based on
much more than the 'if it's on it sounds beautiful' mentality that's
very common both in the hobby and in commercial tech service, today.

Re: QUESTIONS ABOUT RESISTORS IN TUBE RADIOS

han...@julie.lostwells.net (HankVC) — Thu, 07 Jan 2010 19:56:07 UT

Yes. For a resistance-coupled amplifier, you look at the output
impedance of the driving stage (12SQ7 in an AA5) and the input
impedance of the driven stage, (50L6 in an AA5) and figure out where
the coupling cap impedance is going to reduce the drive to the output
by 50%. That's the 3db power (6db voltage) point---the point at which

Re: "GREEN LAMPS" DON'T ALWAYS WORK.

dpeterm...@worldnet.att.net (D. Peter Maus) — Thu, 07 Jan 2010 19:48:14 UT

Not even close.

Re: QUESTIONS ABOUT RESISTORS IN TUBE RADIOS

dpeterm...@worldnet.att.net (D. Peter Maus) — Thu, 07 Jan 2010 19:47:18 UT

Actually, the parts are timed out, regardless of performance. So,
an overhaul of a currently well running engine is common.
We just did the helicopter last year, even though performance was
spot on.