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Question
Hi-I have a Heathkit AR-29 stereo receiver that I built back around 1970. Every so often I would have to spray the tuner "fins"
with tuner cleaner to keep FM reception. This always worked. This last time I sprayed the fins with DEOXIT D5 and have totally lost
all fm reception. The AM reception has not been effected by this and works quite well. Do you have any ideas on what I may have done to the FM section of this tuner ???
Thanks for your time,
Chuck
Get a can of air or freon and see if you can blow out the debris that is causing the high frequency leakages of the tuning cap. That should clear it up. FM works at a much higher frequency than AM so while it may be working fine in the AM band it may be shorting down or going way out of tune in the FM band.
The I don't recommend you use any chemicals on the plates. Such chemicals may be causing more trouble than good. Use only forced air to clean out the dust or micro particles.
Hope this helps.
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Answers by Expert:
Cleggsan
Expertise
Audio Design Engineer; systems, loudspeakers, cd/dvd players, etc. I am knowledgeable in all high end audio equipment and installations. MAKE SURE YOU GIVE A MAKE AND MODEL NUMBER AND CAR IF IT IS AN AUTO QUESTION. Note: I am getting some who ask good questions that take a lot of time to research but then the questioner fails to read the answer. Please don't ask questions unless you are seriously looking for an answer. If you find an answer to your question otherwise then let me know with your reply. Thank you.
Experience
Have been associated with audio design, standards, testing and component systems for over 40 years.
Organizations
Life Fellow Member of Audio Engineering Society
Life Senior Member of Institute of Electronic and Electrical Engineers
Publications
Review technical manuscripts for IEEE Spectrum
Write occasionally for high-end audio publications
Education/Credentials
BSEE/MSCS/MBA
Past/Present Clients
Past Employee/advisor to several well known audio products manufacturers
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