[Boatanchors] Trio 9R-59D /DS trivia

bonddaleena at aol.com bonddaleena at aol.com
Wed Dec 15 15:43:55 EST 2010


Hi, I recently purchased and refurbed a Trio 9R-59D. I am very, very impressed with the performance of this 6 tube radio. Is there anyone that might have an idea where a person might find a Service Manual?? I have the Operating Manual, it's on BAMA.

For those interested, here's some 'strange things' about the radio and the Manual:

1. There is NO alignment info in the Op Manual. My radio still has all the intact white paint that Trio/Lafayette used on their radios.
It plays so well, I am not going to touch it (unusual for me!!!) ha ha

2. The radio has a wired tube socket for an 0A2 regulator tube which was an option! 

3. Next to the 0A2 socket, are a couple of holes in the chassis, to add a calibrator crystal socket. The Op Manual gives a schematic for constructing your own solid state calibrator.

4. A section in the Manual gives very specific directions on how to "cut off a pattern path" on one of the circuit boards using a razor blade. For what, I have NO idea....

5. The Manual also states "since 1/2 of the 6AQ8 in the local oscillator circuit has been left unused, it may be interesting to use it as a cathode follower to feed the mixer". Again, HUH???

6. The Manual gives hints on how to check both the audio and IF stages. Good info on dial cord re-stringing, but not a word about alignment..

7. The 'theory' section speaks about the use of Mechanical (Piezo-Transducer) Filters in the radio. All I could find were some small, IF transformers with slugs. There are also the conventional, larger IF cans in the IF chain.

My radio worked but self oscillated. ALL the paper caps were NG, the electrolytic's had changed value 100% +, and one tube leaked.

I would like to find: (and willing to pay for)

A. a Service Manual
B. a photo or scan of the label on the bottom cover that shows the location of the RF, OSC, and ANT coils and caps. I only have 1/2 of it.. ha ha

Thanks for the time.

ron
N4UE





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