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They have both local oscillator coils
and IF transformers for AM tube
radios listed. P-C208B, P-C70-OSC,
and P-C78 look like the ones.
replacing it with something new. I just
purchased a Shure M97xe and I have
Kevin Kaas, C.E. SPC-TV
Does anyone have a schematic
for a simple light meter? I'm trying
to determine the difference in
illumination provided by CFLs as
opposed to incandescent light bulbs.
I'm not too interested in the absolute
value of the light hitting the surface,
just the relative difference between
[#10126 - October 2012]
I have not used my turntable on
my sound system for some years,
but the other day, I had the urge to
rediscover some of my old vinyl discs.
To my dismay, there was no sound
when I put on a disc. Troubleshooting
led to the phono cartridge, an AKG
I went online to see if any of these
are still available, and at the same time
came across some audio blogs describing the exact same problem being that
these particular cartridges are moving
magnet types and appear to be prone
to losing their magnetism over a period
of time. This does not occur with
moving coil cartridges. Would anyone
know of a way to remagnetize the coils
in these types of cartridges?
Nuts & Volts
[#10124 - October 2012]
Vintage Parts Hunter
Does anyone have or happen to
know where I can obtain a pair of 455
kHz IF transformer cans, and a Local
oscillator coil for my homebrew AA five
tube super heterodyne AM receiver?
I am using the 12BE6, 12BA6,
12AV6, 50C5, and my friendly 35W4
to build my set. Are there any "old new
stock parts" establishments still around
these days that may have the vintage
parts I require?
I know I can still buy yesteryear
radio sets that have what I need.
However, I would be more likely to
repair them as they are, than to scrap
any of them for the parts.
I have my trusty 365 pF dual gang
air core variable tuning capacitor with
the reduced capacity second rotor set.
I hope to have no difficulty obtaining
all the rest of the parts, as well.
Can any of you high tech experts
direct me to where I can get the above
named parts I am lacking? Thanks for
Chances are the magnets are
okay on your stylus; the problem is
most likely with the coil system in the
cartridge body. The coils are not to be
magnetized; their job is to generate
a voltage from the mechanical
movement of the magnets on the
stylus shank when playing a record.
My experience with the AKG P8 is
that it does not age well, so rather
than fight a losing battle I suggest
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80 December 2012
Look at www.tubesandmore.com
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