Philco 70 Cathedral

Thread Rating:

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

Linear Mode

Philco 70 Cathedral

BrendaAnnD
Phorum Expert

Posts: 1,111
Threads: 90
Joined: Jun 2011
City: Tacoma State, Province, Country: Washington

#21

05-26-2021, 01:19 AM

Ron Ramirez is right. You don't want that primary wound on top of the secondary. Reason is that the coil is designed for nominal coupling across the band. If you were to wind it on top, you may get better coupling in the lower part of the band, but you would lose total Q in the circuit and also change how it tracks across the band...

Find

« Next Oldest | Next Newest »

Messages In This Thread

Philco 70 Cathedral - by 462ron - 02-10-2021, 02:46 PM

RE: Philco 70 Cathedral - by Radioroslyn - 02-10-2021, 03:17 PM

RE: Philco 70 Cathedral - by 462ron - 02-10-2021, 11:12 PM

RE: Philco 70 Cathedral - by 462ron - 02-24-2021, 02:56 PM

RE: Philco 70 Cathedral - by patrician56 - 02-24-2021, 04:48 PM

RE: Philco 70 Cathedral - by patrician56 - 02-24-2021, 04:50 PM

RE: Philco 70 Cathedral - by Radioroslyn - 02-24-2021, 07:34 PM

RE: Philco 70 Cathedral - by 462ron - 02-25-2021, 07:16 AM

RE: Philco 70 Cathedral - by Radioroslyn - 02-25-2021, 08:56 AM

RE: Philco 70 Cathedral - by 462ron - 02-25-2021, 09:05 AM

RE: Philco 70 Cathedral - by Steve Davis - 02-25-2021, 09:22 AM

RE: Philco 70 Cathedral - by 462ron - 02-25-2021, 11:10 AM

RE: Philco 70 Cathedral - by 462ron - 04-12-2021, 01:49 PM

RE: Philco 70 Cathedral - by rfeenstra - 04-12-2021, 03:38 PM

RE: Philco 70 Cathedral - by 462ron - 04-12-2021, 05:15 PM

RE: Philco 70 Cathedral - by 462ron - 05-25-2021, 03:26 PM

RE: Philco 70 Cathedral - by Paul Philco322 - 05-25-2021, 04:03 PM

RE: Philco 70 Cathedral - by Ron Ramirez - 05-25-2021, 04:06 PM

RE: Philco 70 Cathedral - by 462ron - 05-25-2021, 05:11 PM

RE: Philco 70 Cathedral - by Ron Ramirez - 05-25-2021, 10:00 PM

RE: Philco 70 Cathedral - by BrendaAnnD - 05-26-2021, 01:19 AM

RE: Philco 70 Cathedral - by 462ron - 05-26-2021, 06:55 AM

RE: Philco 70 Cathedral - by Radioroslyn - 05-26-2021, 07:26 AM

RE: Philco 70 Cathedral - by Radioroslyn - 05-26-2021, 09:10 AM

RE: Philco 70 Cathedral - by 462ron - 05-26-2021, 11:31 AM

View a Printable Version

Users browsing this thread: 9 Guest(s)

Recent Posts
Predicta Repairs Locally in So. Cal.?
I get that there seems to be less & less who are capable & knowledgeable to play with the vintage TV's. The gen...1962300 — 10:32 AM
Predicta Repairs Locally in So. Cal.?
Considerable TV data is stored on World Radio History. ChasChas — 03:33 PM
Model 41-295 rectifier tube 5Z3 vs 80
The 80 and 5Z3 are both full-wave rectifiers, and interchangable. The difference is the current draw and output. The 5...GarySP — 11:15 AM
Philco 37-116 toner
I will say i have sprayed over the Maguire's with no problem so there must not be any silicones etc in it Billpoulsbobill — 10:29 AM
Model 41-295 rectifier tube 5Z3 vs 80
I would the 80 less strain on power transformervinzer — 10:02 AM
Predicta Repairs Locally in So. Cal.?
Saddly, a lot of the techs knowledgable on these older sets are passing away, having health issues and simply aging. The...TV MAN — 08:42 AM
462ron
Thanks everyone for your responses and links to articles and products. A lot to ponder here. It will probably be a few w...462ron — 07:54 AM
Model 41-295 rectifier tube 5Z3 vs 80
If the 5Z3 and filters look original, I'd say stay with those components and values.The discrepancy may be the result of...Brad Winder — 06:47 AM
Model 41-295 rectifier tube 5Z3 vs 80
Restoring a 41-295. Every schematic I've seen has an 80 rectifier tube and the electrolytics in the pi filter are 18uF ...FredM — 04:30 AM
Philco 37-116 toner
This may be irrelevant for different wood finishes from even longer ago, but maybe useful to research. Back in 1988 a...murrayatuptown — 01:53 AM

Who's Online

There are currently 2150 online users. [Complete List]
» 3 Member(s) | 2147 Guest(s)

Login
Username:
Password:	Lost Password?
	Remember me