38-15 Chairside Antenna

Thread Rating:

0 Vote(s) - 0 Average
1
2
3
4
5

Linear Mode

38-15 Chairside Antenna

morzh
Odobenus rosmarus

Posts: 15,444
Threads: 539
Joined: Oct 2011
City: Jackson, NJ

09-06-2017, 08:20 PM

(09-06-2017, 07:56 PM)robsradioactive Wrote: 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.

Rob

Yep. Very typical.

People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.

Find

« Next Oldest | Next Newest »

Messages In This Thread

38-15 Chairside Antenna - by robsradioactive - 09-05-2017, 07:56 AM

RE: 38-15 Chairside Antenna - by Radioroslyn - 09-05-2017, 10:51 AM

RE: 38-15 Chairside Antenna - by morzh - 09-05-2017, 12:53 PM

RE: 38-15 Chairside Antenna - by robsradioactive - 09-05-2017, 05:53 PM

RE: 38-15 Chairside Antenna - by NostalgiaRadioTime - 09-05-2017, 08:51 PM

RE: 38-15 Chairside Antenna - by morzh - 09-05-2017, 10:09 PM

RE: 38-15 Chairside Antenna - by robsradioactive - 09-06-2017, 07:56 PM

RE: 38-15 Chairside Antenna - by morzh - 09-06-2017, 08:20 PM

RE: 38-15 Chairside Antenna - by Chris h - 09-07-2017, 10:02 PM

RE: 38-15 Chairside Antenna - by robsradioactive - 09-09-2017, 02:45 PM

RE: 38-15 Chairside Antenna - by robsradioactive - 09-11-2017, 10:13 PM

View a Printable Version

Users browsing this thread: 1 Guest(s)

Recent Posts
Cannot Adjust an IF Transformer’s cores
Outstanding work indeed. I wish I could come up with solutions like this.slford310 — 11:16 PM
Cannot Adjust an IF Transformer’s cores
The abilities of our 'Phorum Pholks" never ceases to amaze me! Fantastic fabrication, Joseph! I'm waiting now for...GarySP — 08:27 PM
PT-6 antenna connections
Thanks. I never realized that was a notch noted in the schematic as described. I’ll recheck my wiring.bridkarl — 08:13 PM
Cannot Adjust an IF Transformer’s cores
Thank you! I was quite new to the Phorum when I started this post, so I feel like it might be advantageous to publish a ...jrblasde — 08:07 PM
PT-6 antenna connections
Notice in the schematic the notch at the bottom of the antenna coil is between pins 3 & 4. Yes, pin 6 of the 7C6 is...RodB — 07:34 PM
bridkarl
I have two PT-6 chassis. On both there is a blue wire that runs from the above chassis transformer to pin 6 of 7C6. So t...bridkarl — 07:23 PM
Cannot Adjust an IF Transformer’s cores
Joseph, now you are an engineer!!RodB — 06:37 PM
PT-6 antenna connections
Hi, reading your explanation I can see the confusion. If you take it one connection at a time it should result in a desi...RodB — 06:34 PM
Cannot Adjust an IF Transformer’s cores
It works! I received the PCBs this morning in the mail, and put everything together. I reused the base from the original...jrblasde — 04:32 PM
PT-6 antenna connections
I seem to have lost my way on this PT-6. I see the antenna aerial transformer schematic - I’m reading pins 1 through ...bridkarl — 12:30 PM

Who's Online

There are currently 3488 online users. [Complete List]
» 1 Member(s) | 3487 Guest(s)

Login
Username:
Password:	Lost Password?
	Remember me