Model 650 Tone Control Question

Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12) x

Thread Closed

Thread Rating:

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

Linear Mode

Model 650 Tone Control Question

DaleHCook
Philco, Zenith, and Howard Phan

Posts: 174
Threads: 8
Joined: Apr 2023
City: Roanoke State, Province, Country: Virginia

#78

07-13-2023, 05:04 PM

'MrFixr55 Wrote:"Typical" states 6K Ohm for triode connected Push Pull, there is a listing for "cathode bias" showing 10K plate resistance for AB2 Push Pull operation.
...
However, this is academic, as the Philco docs that Ron has stated 6K Ohm Plate resistance. Of course, this info is all lightyears before computers, so either there are mistakes, spec differences between manufacturers or whatever.

6k plate-to-plate is correct as these are triode-connected 42s with fixed bias. If they were cathode biased they would be 10k plate-to-plate. I see no mistakes. The RC-12 data is simply more specific in naming fixed bias.

Dale H. Cook, GR/HP/Tek Collector, Roanoke/Lynchburg, VA
https://plymouthcolony.net/starcity/radios/

Website Find

« Next Oldest | Next Newest »

Thread Closed

Messages In This Thread

Model 650 Tone Control Question - by Hamilton - 06-27-2023, 10:45 AM

RE: Model 650 Tone Control Question - by morzh - 06-27-2023, 12:11 PM

RE: Model 650 Tone Control Question - by Ron Ramirez - 06-27-2023, 02:39 PM

RE: Model 650 Tone Control Question - by Hamilton - 06-27-2023, 05:49 PM

RE: Model 650 Tone Control Question - by morzh - 06-27-2023, 07:26 PM

RE: Model 650 Tone Control Question - by Hamilton - 06-29-2023, 08:03 AM

RE: Model 650 Tone Control Question - by Ron Ramirez - 06-29-2023, 08:17 AM

RE: Model 650 Tone Control Question - by RodB - 06-29-2023, 09:09 AM

RE: Model 650 Tone Control Question - by Ron Ramirez - 06-29-2023, 10:20 AM

RE: Model 650 Tone Control Question - by Chas - 06-29-2023, 10:26 AM

RE: Model 650 Tone Control Question - by Ron Ramirez - 06-29-2023, 10:32 AM

RE: Model 650 Tone Control Question - by morzh - 06-29-2023, 10:57 AM

RE: Model 650 Tone Control Question - by Hamilton - 06-29-2023, 11:46 AM

RE: Model 650 Tone Control Question - by RodB - 06-30-2023, 08:31 AM

RE: Model 650 Tone Control Question - by Hamilton - 06-30-2023, 11:45 AM

RE: Model 650 Tone Control Question - by Hamilton - 06-30-2023, 02:07 PM

RE: Model 650 Tone Control Question - by MrFixr55 - 06-30-2023, 05:22 PM

RE: Model 650 Tone Control Question - by Hamilton - 06-30-2023, 07:57 PM

RE: Model 650 Tone Control Question - by Hamilton - 06-30-2023, 08:13 PM

Hamilton - by Hamilton - 07-03-2023, 10:13 AM

RE: Model 650 Tone Control Question - by DaleHCook - 07-03-2023, 10:28 AM

RE: Model 650 Tone Control Question - by Steve Davis - 07-03-2023, 11:50 AM

RE: Model 650 Tone Control Question - by Hamilton - 07-03-2023, 12:10 PM

RE: Model 650 Tone Control Question - by MrFixr55 - 07-03-2023, 11:25 PM

RE: Model 650 Tone Control Question - by MrFixr55 - 07-04-2023, 12:40 AM

462ron - by 462ron - 07-04-2023, 08:56 AM

Hamilton - by Hamilton - 07-04-2023, 09:54 AM

462ron - by 462ron - 07-04-2023, 10:06 AM

RE: Model 650 Tone Control Question - by DaleHCook - 07-04-2023, 10:43 AM

RE: Model 650 Tone Control Question - by Hamilton - 07-04-2023, 03:13 PM

RE: Model 650 Tone Control Question - by MrFixr55 - 07-04-2023, 04:26 PM

RE: Model 650 Tone Control Question - by MrFixr55 - 07-04-2023, 04:38 PM

RE: Model 650 Tone Control Question - by DaleHCook - 07-04-2023, 05:08 PM

RE: Model 650 Tone Control Question - by radiorich - 07-05-2023, 12:18 AM

RE: Model 650 Tone Control Question - by Hamilton - 07-06-2023, 08:11 AM

RE: Model 650 Tone Control Question - by MrFixr55 - 07-06-2023, 11:40 AM

RE: Model 650 Tone Control Question - by Hamilton - 07-07-2023, 07:48 AM

RE: Model 650 Tone Control Question - by Hamilton - 07-07-2023, 02:59 PM

RE: Model 650 Tone Control Question - by RodB - 07-07-2023, 03:11 PM

RE: Model 650 Tone Control Question - by MrFixr55 - 07-07-2023, 09:23 PM

RE: Model 650 Tone Control Question - by Radioroslyn - 07-07-2023, 09:45 PM

RE: Model 650 Tone Control Question - by Hamilton - 07-08-2023, 09:30 AM

RE: Model 650 Tone Control Question - by MrFixr55 - 07-08-2023, 12:07 PM

RE: Model 650 Tone Control Question - by Radioroslyn - 07-08-2023, 02:45 PM

RE: Model 650 Tone Control Question - by Ron Ramirez - 07-08-2023, 03:44 PM

RE: Model 650 Tone Control Question - by morzh - 07-08-2023, 05:32 PM

RE: Model 650 Tone Control Question - by Hamilton - 07-09-2023, 06:15 AM

RE: Model 650 Tone Control Question - by MrFixr55 - 07-09-2023, 07:55 AM

RE: Model 650 Tone Control Question - by DaleHCook - 07-09-2023, 10:16 AM

RE: Model 650 Tone Control Question - by DaleHCook - 07-09-2023, 11:03 AM

RE: Model 650 Tone Control Question - by Ron Ramirez - 07-09-2023, 11:16 AM

RE: Model 650 Tone Control Question - by DaleHCook - 07-09-2023, 11:24 AM

RE: Model 650 Tone Control Question - by Ron Ramirez - 07-09-2023, 11:28 AM

RE: Model 650 Tone Control Question - by DaleHCook - 07-09-2023, 12:12 PM

RE: Model 650 Tone Control Question - by Ron Ramirez - 07-09-2023, 12:32 PM

RE: Model 650 Tone Control Question - by DaleHCook - 07-09-2023, 01:43 PM

RE: Model 650 Tone Control Question - by Radioroslyn - 07-10-2023, 10:39 AM

RE: Model 650 Tone Control Question - by MrFixr55 - 07-10-2023, 04:39 PM

RE: Model 650 Tone Control Question - by DaleHCook - 07-10-2023, 07:03 PM

RE: Model 650 Tone Control Question - by Radioroslyn - 07-10-2023, 07:57 PM

RE: Model 650 Tone Control Question - by DaleHCook - 07-10-2023, 08:41 PM

RE: Model 650 Tone Control Question - by Radioroslyn - 07-11-2023, 09:04 AM

RE: Model 650 Tone Control Question - by DaleHCook - 07-11-2023, 10:35 AM

RE: Model 650 Tone Control Question - by DaleHCook - 07-11-2023, 03:37 PM

RE: Model 650 Tone Control Question - by MrFixr55 - 07-11-2023, 09:10 PM

RE: Model 650 Tone Control Question - by Radioroslyn - 07-12-2023, 07:41 AM

RE: Model 650 Tone Control Question - by Hamilton - 07-12-2023, 07:50 AM

RE: Model 650 Tone Control Question - by Radioroslyn - 07-12-2023, 08:14 AM

RE: Model 650 Tone Control Question - by DaleHCook - 07-12-2023, 09:14 AM

RE: Model 650 Tone Control Question - by Hamilton - 07-12-2023, 12:20 PM

RE: Model 650 Tone Control Question - by Radioroslyn - 07-12-2023, 04:32 PM

RE: Model 650 Tone Control Question - by MrFixr55 - 07-12-2023, 05:58 PM

RE: Model 650 Tone Control Question - by Hamilton - 07-12-2023, 06:46 PM

RE: Model 650 Tone Control Question - by Hamilton - 07-12-2023, 06:49 PM

RE: Model 650 Tone Control Question - by DaleHCook - 07-13-2023, 09:56 AM

RE: Model 650 Tone Control Question - by MrFixr55 - 07-13-2023, 04:13 PM

RE: Model 650 Tone Control Question - by Arran - 07-13-2023, 04:39 PM

RE: Model 650 Tone Control Question - by DaleHCook - 07-13-2023, 05:04 PM

RE: Model 650 Tone Control Question - by MrFixr55 - 07-13-2023, 05:13 PM

RE: Model 650 Tone Control Question - by Radioroslyn - 07-13-2023, 06:07 PM

RE: Model 650 Tone Control Question - by Ron Ramirez - 07-13-2023, 08:08 PM

RE: Model 650 Tone Control Question - by MrFixr55 - 07-14-2023, 06:05 AM

RE: Model 650 Tone Control Question - by MrFixr55 - 07-14-2023, 06:25 AM

View a Printable Version

Users browsing this thread: 12 Guest(s)

Recent Posts
6TPZ and 5TPO Radio Help
Since these radios operated in harsh environments (temp changes and vibration) you could touch a soldering iron to all t...GarySP — 03:18 PM
6TPZ and 5TPO Radio Help
Thank you Gary. Hi Morzh. These radios are 6 transistor radios. Sadly no tubes. Thanks though.R3Sons — 02:19 PM
Heathkit Sweep Generator TS-4
Ron Instead of Quick reply, go to New Reply, then go to the title of the very first post, and change the title text the...morzh — 02:00 PM
6TPZ and 5TPO Radio Help
I am not a specialist in car radios. I suspect they might use vibrators to convert 12V to acceptable tube voltages, so ...morzh — 01:58 PM
6TPZ and 5TPO Radio Help
Welcome to the Phorum, R3Sons! I have very limited experience with car radios other than installing custom radios back ...GarySP — 01:08 PM
462ron
OK, I need to rename this thread to say..Eico 368 TV/FM Sweep Generator instead of the current title..Heathkit Sweep Gen...462ron — 12:49 PM
6TPZ and 5TPO Radio Help
Hello, I have a Philco (Ford) 6TPZ and a 5TPO radio. I replaced the electrolytic capacitors in both. I have the SAMS m...R3Sons — 12:29 PM
The list of my radio & TV collection!
Hello Peter, Thank you for posting that !! Sincerely Richardradiorich — 09:40 AM
Eico 232 VTVM Schematic
It's a microwave antenna. ?;-p?. I substituted 1N4002s off the 6.3 vac winding for the 1.5 volt battery. Uniprobe is the...RodB — 05:50 PM
Eico 232 VTVM Schematic
Try BAMA for a schematic. Looks like a replacement power source for the D battery has been installed. The tube may be...Chas — 04:51 PM

Who's Online

There are currently 9032 online users. [Complete List]
» 1 Member(s) | 9031 Guest(s)

Login
Username:
Password:	Lost Password?
	Remember me