1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Linear Mode
Model 90 Tube Shield
Allen in SB
Junior Member
**
Posts: 45
Threads: 10
Joined: Dec 2007
City: Santa Barbara, CA
#1

06-25-2010, 10:16 PM
I’m considering buying a Model 90 cathedral that is missing the large 3-tube tube shield. Philco made three versions of this model with different output tubes (early w/ two 45s; mid w/ one 47; and late w/ two 47s). “My” radio is the mid version. Does anyone know if the large tube shields for these three models are interchangeable? The early and mid versions appear to have the same tubes and tube layout for the tubes in the large tube shield (24, 27 and 24). The late version appears to have different tubes and a different tube layout. Therefore, perhaps the early and mid versions are interchangeable.

Additionally, the radio has a vertical bracket on the opposite side between the rectifier (80) and output tube (47). You can see the bracket in this video (5 minutes into video): http://www.youtube.com/watch?v=ptQ2d0VsZmc Does anyone know the purpose of this bracket? Another tube shield?

Thanks!
Find
« Next Oldest | Next Newest »


Messages In This Thread
Model 90 Tube Shield - by Allen in SB - 06-25-2010, 10:16 PM
Re: Model 90 Tube Shield - by Ron Ramirez - 07-04-2010, 07:30 AM
Re: Model 90 Tube Shield - by Allen in SB - 07-06-2010, 10:31 PM



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 no members online.

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