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 Post subject: Buckingham schematic ??
PostPosted: Oct Sun 25, 2020 1:29 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 364
Location: Elkhorn,Wisconsin,United States
Hello,
This morning I went to a garage sale held by some WARCI club members. I bought this radio because I needed a power transformer for a Radiola 48. The 48 needs 10 amps at 2.5 volt for all the filaments. The radio has a DIY cabinet, and the sales label was labeled Brunswick. I never noticed the nameplate over the dial till I got home. It was labeled " Buckingham " . I cleaned off the name plate inside and it says,: " Model 80 ". I checked the four Riders schematics listed in the index and found none, matched the tube compliment for this chassis. This chassis uses four 24's, one 27, one 80, and two 45s. Has anyone ever seen this chassis or its' original cabinet. Could it have been manufactured by someone else? The label does say it was made in Chicago. and licensed under the usual RCA patents. This chassis is a backup in case another chassis I bought has a defective pwr xfmr.
Thanks for looking,
Ed


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 Post subject: Re: Buckingham schematic ??
PostPosted: Oct Sun 25, 2020 1:57 am 
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Joined: Jan Tue 31, 2012 1:55 am
Posts: 14656
Location: Mountains of Mourne. Ireland.
A schematic for Buckingham Radio Corp. model 80 can be found in Beitman's volume (one) 1926 - 38
26 26 26 27 26 71A 71A 80

Direct download→ https://worldradiohistory.com/Archive-R ... 6-1938.pdf
from: https://worldradiohistory.com/Beitman-Manual.htm

Greg.


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 Post subject: Re: Buckingham schematic ??
PostPosted: Oct Sun 25, 2020 2:45 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 364
Location: Elkhorn,Wisconsin,United States
Hi Greg,
I already knew about the info you posted. I bought a copy of that Beitmans back in the early seventies. The tube line-up you posted doesn't match what my chassis sockets call for. There is another Buckingham with 27s in place of the 26s , and that doesn't match either.
Thanks,
Ed


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 Post subject: Re: Buckingham schematic ??
PostPosted: Oct Sun 25, 2020 3:42 am 
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Joined: Jan Tue 31, 2012 1:55 am
Posts: 14656
Location: Mountains of Mourne. Ireland.
This is all that I know of.


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 Post subject: Re: Buckingham schematic ??
PostPosted: Oct Sun 25, 2020 4:53 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 364
Location: Elkhorn,Wisconsin,United States
Looks like I found another oddball Greg,. thanks for checking.
Ed


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 Post subject: Re: Buckingham schematic ??
PostPosted: Oct Sun 25, 2020 3:57 pm 
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Joined: Jan Tue 31, 2012 1:55 am
Posts: 14656
Location: Mountains of Mourne. Ireland.
Can you list the the highest patent number on the license plate?

fyi... Buckingham displayed 5 six-tube sets at the 1928 Chicago Radio Show, sponsored by the Radio Manufacturers Association (RMA)


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Last edited by egg on Oct Sun 25, 2020 4:44 pm, edited 1 time in total.
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 Post subject: Re: Buckingham schematic ??
PostPosted: Oct Sun 25, 2020 4:28 pm 
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Joined: Jan Mon 18, 2010 2:13 am
Posts: 21444
Location: Dayton Ohio
The radio has top cap tubes, which the first were 24A.
1928 pre-dates the use of them. I don't think anyone had them in their radios until 1929.

-Steve

_________________
Radio Interests
-Zenith
-Sparton
-Pre-War FM
Consoles and floor models, the bigger, the better!


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 Post subject: Re: Buckingham schematic ??
PostPosted: Oct Sun 25, 2020 6:03 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 6084
Location: Minneapolis, MN USA
I have Riders indexed in a database on my Mac. (searchable on all parameters entered in Larsens Locator up to 8 tubes).
It finds 118 listings with that lineup, of which 1 is for Buckingham.
It is located in Riders 7, Misc page 4.
Let me know if you would like an email list by Riders volume and page for the matching lineups.


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 Post subject: Re: Buckingham schematic ??
PostPosted: Oct Sun 25, 2020 6:11 pm 
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Location: Mountains of Mourne. Ireland.
Great sleuthing Dale... :)

http://americanradiohistory.com/hd2/IDX ... e-0005.pdf
http://americanradiohistory.com/hd2/IDX ... e-0003.pdf

Greg.


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 Post subject: Re: Buckingham schematic ??
PostPosted: Oct Sun 25, 2020 9:08 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 364
Location: Elkhorn,Wisconsin,United States
Thanks for researching this Dale. I found the schematic you posted , last night also. It is not an exact match either. I removed the chassis this morning to get a better view. Looking at the underside, resistors and a lot of caps were replaced back in the 50's or 60's. The caps are branded Knight and sold by Allied. There is a 2 inch diameter round electrolytic cap mounted under the usual rectangular container for the old sealed dry paper caps. The large round cap mounting is similar to the type by Aerovox I found in a Sparton 931AC. In case it's hard to read, the last two highest patent numbers are 1626391 and 1631646 , Greg.
Ed


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