Philco 91-121 sensitivity

Thread Rating:

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

Linear Mode

Philco 91-121 sensitivity

grandntl
Junior Member

Posts: 19
Threads: 3
Joined: Jul 2017
City: West Chester, PA

#16

11-01-2017, 09:29 AM

If anyone has a 91-121 or 91/221 ( broadcast only) radio and you want to check, please see if your on/off switch has an extra "on" position (far right) that affects the sensitivity. The schematic and 44RF cathode tube socket data don't make sense as shown, thank you Terry, but 25 volts with the switch off and 5 volts with it on could account for this. The schematic and tube voltage data are here: http://www.nostalgiaair.org/Resources/884/M0013884.htm
Bob

Find

« Next Oldest | Next Newest »

Messages In This Thread

Philco 91-121 sensitivity - by grandntl - 10-05-2017, 02:41 PM

RE: Philco 91-121 sensitivity - by Ron Ramirez - 10-05-2017, 02:58 PM

RE: Philco 91-121 sensitivity - by Radioroslyn - 10-05-2017, 04:34 PM

RE: Philco 91-121 sensitivity - by grandntl - 10-06-2017, 07:51 AM

RE: Philco 91-121 sensitivity - by Radioroslyn - 10-06-2017, 09:19 AM

RE: Philco 91-121 sensitivity - by grandntl - 10-06-2017, 11:49 AM

RE: Philco 91-121 sensitivity - by Radioroslyn - 10-06-2017, 12:22 PM

RE: Philco 91-121 sensitivity - by grandntl - 10-06-2017, 01:28 PM

RE: Philco 91-121 sensitivity - by Radioroslyn - 10-06-2017, 02:26 PM

RE: Philco 91-121 sensitivity - by grandntl - 10-06-2017, 04:59 PM

RE: Philco 91-121 sensitivity - by Radioroslyn - 10-06-2017, 06:39 PM

RE: Philco 91-121 sensitivity - by grandntl - 10-27-2017, 02:32 PM

RE: Philco 91-121 sensitivity - by grandntl - 10-28-2017, 07:41 AM

RE: Philco 91-121 sensitivity - by grandntl - 10-29-2017, 11:29 AM

RE: Philco 91-121 sensitivity - by Radioroslyn - 10-29-2017, 12:48 PM

RE: Philco 91-121 sensitivity - by grandntl - 11-01-2017, 09:29 AM

RE: Philco 91-121 sensitivity - by Ron Ramirez - 11-01-2017, 11:48 AM

RE: Philco 91-121 sensitivity - by klondike98 - 11-01-2017, 12:42 PM

RE: Philco 91-121 sensitivity - by grandntl - 11-02-2017, 09:08 AM

RE: Philco 91-121 sensitivity - by grandntl - 11-14-2017, 01:16 PM

RE: Philco 91-121 sensitivity - by klondike98 - 11-14-2017, 01:39 PM

View a Printable Version

Users browsing this thread: 1 Guest(s)

Recent Posts
Correct model 84 Ac plug an cord type
From what I read Philco went to using brown rubber power cords in 1936, so cloth was used in the 1935 and earlier models...Arran — 11:25 PM
Correct model 84 Ac plug an cord type
Hi Bruce, I have not worked on an 84, but in general, power cords for almost any radio prior to 1938 was cloth covered...MrFixr55 — 08:34 PM
Restoring Philco 38-14
OK, well, so after staring at the sch again, I realized the problem had to be the #12/12A padder. I put a scope on the o...morzh — 08:15 PM
Correct model 84 Ac plug an cord type
Hello Bruce, I mostly use brown far as my cloth powercords go ! Here is the plug that I have used bakelite Acorn style...radiorich — 08:05 PM
Correct model 84 Ac plug an cord type
Looking for as correct as can find the right Ac plug an the correct colored cloth line. Ive seen many old photos but mos...Bruce — 04:13 PM
Restoring Philco 38-14
Rod Two Y-caps make sense if you use them from L/N to the chassis; this is only makes sense in the transformer radios...morzh — 10:11 AM
Restoring Philco 38-14
Mike, I'm curious about a specific use of he Y cap. Lately I've seen a single cap across the power transformer primary. ...RodB — 09:01 AM
Restoring Philco 38-14
hello morzh , That sounds like a plan ! Sincerely Richardradiorich — 07:45 AM
Restoring Philco 38-14
Richard, It helped some, but I still had the whining when engaging the rear power strip (I did not realize it was fro...morzh — 07:07 AM
Restoring Philco 38-14
Hello morzh, Yes , that dreaded hum in my room where i do alighment I have my cable modem and router plus desktop plus ...radiorich — 11:25 PM

Who's Online

There are currently 2436 online users. [Complete List]
» 1 Member(s) | 2435 Guest(s)

Login
Username:
Password:	Lost Password?
	Remember me