Eric H
04-07-2017, 09:50 PM
I'm working on a 53 Philco, model 22-4309.
Specifically I need a correct schematic for the RF chassis RF 91A Run 2.
The Sams is generic and not even close for this set and I have a couple resistors I need the value for.
Possibly it might be in the 1953 or 54 "Most Needed" books but I don't have those years.
Thanks!
madRad45
04-07-2017, 11:08 PM
American Radio History has some of the Beitman's manuals. The RF-91 chassis is covered on pages 114 & 115 here:
http://americanradiohistory.com/Archive-Rider/BEITMAN-SUPREME/Beitman-1953-TV.pdf
Don't know if it's the correct one for RF-91A Run 2, but take a look.
Crist Rigott
04-07-2017, 11:21 PM
I'm working on a 53 Philco, model 22-4309.
Specifically I need a correct schematic for the RF chassis RF 91A Run 2.
The Sams is generic and not even close for this set and I have a couple resistors I need the value for.
Possibly it might be in the 1953 or 54 "Most Needed" books but I don't have those years.
Thanks!
What SAMS are you looking at. I have the Most Wanted on CD so I have all of their books. Also I'm looking at Riders 10-35 and have a schematic for a 91 RF chassis. But I couldn't find anything on model 22-4309? could this be a typo?
Crist Rigott
04-07-2017, 11:36 PM
American Radio History has some of the Beitman's manuals. The RF-91 chassis is covered on pages 114 & 115 here:
http://americanradiohistory.com/Archive-Rider/BEITMAN-SUPREME/Beitman-1953-TV.pdf
Don't know if it's the correct one for RF-91A Run 2, but take a look.
Pages 114 & 115 is what's in the Riders 10-44.
Eric H
04-08-2017, 12:54 AM
madRad45, that appears to be the right one, or at least close enough, thank you!
It's a resistor off of TC401, 220 ohms, which seems right since I could tell the first band was red.
Crist, My Sams is a 201-7, it wasn't for this set but it was what I had on hand, both are split chassis sets and are similar but not exact.
The model number has always been a bit of a mystery in this set. The tag has T-2288S but it's been blacked out and the 22-4309 is hand written after it, this appears to be a factory change.
My set has a Tone control that's not marked on the control panel, I don't see it on this schematic either, possibly a production change, or this cabinet was originally destined for another chassis and got changed, hence the model change?
madRad45
04-08-2017, 09:28 AM
If you have access to a copy of Sams 185-10, it appears to be an RF-91 chassis with a concentric volume/tone control and the 220 ohm resistor hanging off the sound I.F. If you need a copy, I can scan and e-mail it, but it will take a day or two to get it scanned.
Eric H
04-08-2017, 11:23 AM
If you need a copy, I can scan and e-mail it, but it will take a day or two to get it scanned.
Thank you for the offer but I got the set back together last night with the info from the americanradiohistory site.
I found a copy of the Sams on eBay for $4 so I got it for the next time, the picture on the cover looks like the right set, different cabinet but the same basic set. :yes:
I appreciate you figuring out which Sams it was. I've had this set for about 18 years, I repaired it at that time but it's been running on most of it's original Electrolytics since then. I found one Can with a 1978 date code on it, I think I installed that back around 1999, it still works so I'm going to leave it.