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FM-5 Tuner, with cartridge lamp replacement kit
The FM-5 tuner was the transistorized successor to their popular FM-3 tube tuner. The FM-5 had auxiliary inputs and a volume control, and so could be the center of a simple system when combined with a power amplifier like the ST-80 or ST-120. It has a good reputation, and good sound, selectivity, and quieting.
Here's a pdf copy of the FM-5 assembly and service manual, a really nice scan, so it's a big file (45 MB).
Early versions of the FM-5 had PCB's labeled PC20 (RF board) and PC21 (power supply/audio/decoder board). For later versions, like the ones shown in the assembly manual above, the PCB's are designated PC-25 (RF board) and PC-26 (power supply/audio/decoder board).
The assembly manual is a bit sketchy. I'm using this place to collect some measured data to supplement the missing data in the manual
The AF-6 tuner combined the FM section of the FM-5 with an AM tuner, thus the name AF-6, for AM-FM Tuner 6 (a bit of speculation here, of course).
Here's a pdf copy of the AF-6 assembly and service manual, scanned at quite high resolution so it's pretty huge (90 MB).
Dynaco used custom lamps to illuminate the tuning dial. They kind of look like a 3AG fuse, but they are longer and thinner. They are also completely unavailable today. But, there is an alternative coming. We're developing an LED-based replacement that fits into the metal end caps from the original dial lamps. So, save your old cartridge lamps, particularly the metal end caps.
Here's a link to order the lamp replacement kit.
This kit works equally well in the FM-5 and AF-6.
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