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38-15 Chairside Antenna
robsradioactive
Junior Member
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Posts: 30
Threads: 3
Joined: Aug 2017
City: Des Moines, Iowa
#7

09-06-2017, 08:56 PM
Thanks again you guys! I swapped the 6A7 for a tested and, apparently, N.O.S. tube. That made a huge improvement.
I then tested the original 6A7 on my (calibrated) Hickok 600A and it showed [?] on the pentode section.

Turned the english to 73 and that made the meter read Gm of about 600/1000 (average new tube).
The oscillator section was fine at nearly 500/300(" ").

Emission tests good, so I must have originally just done an emission test (or maybe enhanced emission test depending on who you believe) on my Jackson 648. I don't know how else I could have missed that marginal tube.

Also, I may try that tunable loop antenna!

Rob
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Messages In This Thread
38-15 Chairside Antenna - by robsradioactive - 09-05-2017, 08:56 AM
RE: 38-15 Chairside Antenna - by Radioroslyn - 09-05-2017, 11:51 AM
RE: 38-15 Chairside Antenna - by morzh - 09-05-2017, 01:53 PM
RE: 38-15 Chairside Antenna - by robsradioactive - 09-05-2017, 06:53 PM
RE: 38-15 Chairside Antenna - by morzh - 09-05-2017, 11:09 PM
RE: 38-15 Chairside Antenna - by robsradioactive - 09-06-2017, 08:56 PM
RE: 38-15 Chairside Antenna - by morzh - 09-06-2017, 09:20 PM
RE: 38-15 Chairside Antenna - by Chris h - 09-07-2017, 11:02 PM
RE: 38-15 Chairside Antenna - by robsradioactive - 09-09-2017, 03:45 PM
RE: 38-15 Chairside Antenna - by robsradioactive - 09-11-2017, 11:13 PM



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