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Nederlands Forum over Oude Radio's |
Re: RCA Radiola 44. Leuk kadootje, maar...
Geschreven door Roland Huisman op 10. Dec 2004 18:40:42:
In reactie op: Re: RCA Radiola 44. Leuk kadootje, maar... geschreven door John Hupse op 10. Dec 2004 12:36:17:
Hoi John,
Sonny is snel met reageren zeg!
================== Mijn mailtje: ================
Hello sonny!Nice site you have! I've a question about the chassis
of a radiola 44. A friend of mine gave this radio to me.
The cabinet looks good for a radio of his age.
The HF shielding and a switch are missing but that's
not really a problem.But... As you can see on picture 3 the chassis has some
age problems. The chassis is bending to all directions.
Because of this, the tuningcapacitor plates are shorted
and they can't rotate anymore.Can you explain why this chassis is in this bad condition?
Do you know if there are newly produced chassis for these radio's?
maybe this is a faulty mix athe the production of the used metals?
Do you have any experience with this?Thanks and greetings, Roland
=================== Sonny's reactie: ============================
Greetings Roland from the Pacific NW region of the USA. Yes I have had
experience with bad "pot metal" but I must say your is the worst case I've
ever seen. I also have one of those sets with a bad pot metal chassis.
Sometimes it's only slightly distorted and you can make some adjustments
with the capacitor mountings to keep the plates from contacting each other.
Yours is hopeless, so you'll have to find another radio for salvage.I've seen a lot of Radiola's using the same chassis (Radiola 44, 46 & 21)
and most of the have distorted pot metal chassis.The reason; when Pot Metal self destructs it's because the original mixture
of the compound and elements that make up Pot Metal was incorrect, this was
usually due to the fact that those making the stuff had a habit of sometimes
throwing in the dross and other stuff laying around at the end of the day
into the molten mixture. So when the defective Pot Metal deteriorates, it
swells and not only breaks up but changes shape and size. So you would need
to find one that has not deteriorated to use as a pattern. Some Pot Metal
(that which was properly formulated) remains perfectly good today.I have a good chassis and have tried to find someone to replicate it but no
"takers" without great expense. I've also though of construction a chassis
with solid brass stock bars 1/8" thick cut and soldered and or bolted
together.Pot metal usage was very common in other casings of early US made radios and
often a problem.Sonny, the RadiolaGuy
--------------------------------------------------------Kortom: ik heb een vrijdagmiddag radio
Als iemand een chassis over heeft hoor ik het graag!
Voorlopig laat ik dit dus maar in de kast staan...
Hij ziet er tenslotte wel erg leuk uitGroetjes, Roland