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Doug, are the outputs germanium too? I can see the Motorola drivers would be, but those outputs were made by Delco, who had graduated to all-silicon by 1970. Some of the later high-power Zenith Allegro units used a similar amp, with Delco outputs. DTS-701's, IIRC, and Zenith's replacements were all Delco straight up, with no 121- markings. Those little IEC-branded black caps were called firecrackers back in the day - the mantra was "replace all of the Callins and Firecrackers....and it'll be fixed."
I'll do some digging tomorrow - I may have the Zenith lit for your unit. My stuff runs through 1972, and gets spotty after that, with the exception of clock radios and record changers. I'll also check my deep storage for the Zenith drivers - you can always replace them with ECG/NTE 121's. We used a stash of 2N1558's we had - good Motorola PNP Germaniums made for military aircraft inverters. They were surplused by the thousands when Vietnam wound down.
Lemme get to checking for you - Cheers,
__________________
Brian
USN RET 22YRS (Avionics/Cal)
CET-Consumer Repair and Avionics ('88)
"Capacitor Cosmetologist since '79"
When fuses go to work, they quit!
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