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Model 70 progress
Ron Ramirez
Silent Key
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Posts: 13,776
Threads: 580
Joined: Sep 2005
City: Ferdinand State, Province, Country: Indiana
#6

08-02-2015, 07:20 PM
Only the early 90 with push-pull 45 output tubes used the power detector. The 90 with single 47 output and the 90 with push-pull outputs used a 27 wired as a diode as the second detector, producing cleaner sound.

Likewise, the early model 70s used the power detector - late versions did not.
--
Ron Ramirez
Ferdinand IN
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Messages In This Thread
Model 70 progress - by KCMike - 08-01-2015, 11:32 AM
RE: Model 70 progress - by Radioroslyn - 08-01-2015, 05:32 PM
RE: Model 70 progress - by KCMike - 08-01-2015, 06:52 PM
RE: Model 70 progress - by Radioroslyn - 08-02-2015, 10:14 AM
RE: Model 70 progress - by codefox1 - 08-02-2015, 06:38 PM
RE: Model 70 progress - by Ron Ramirez - 08-02-2015, 07:20 PM



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  1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration