[Arran]

[Image: https://philcoradio.com/phorum/uploads/a...1645067277]
[b][b][b]MrFixr55[/b][/b][/b] 
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Posts: 1,549
Threads: 12
Joined: Jul 2020
City: Greenlawn State, Province, Country: NY

[b]#19[/b]

Yesterday, 05:15 PM
I had a collector call these metal cased Atwater Kents "Hotwater Cans", although they don't really get that warm. I have a Model 40. It performs very similar to the RCA Radiola 18 that I also have, which is not remarkable as the tube complement is the same.

If I am right, there are no electrolytics in this set, but the paper caps (similar to those in Radiolas of the same period) are known to short. The extra socket on the power supply is for an extra 71, as this is Push-Pull. Another manufacturer of tables for these sets is "Kiel". These are the 6 legged tables that look like lamp tables.

Other than the use of a '26 instead of a '27, the audio section is similar to the Philco Model 20 and the interstage transformer article in our library applies:
https://philcoradio.com/library/index.ph...nsformers/

The 2 big issues with this set are the hum caused by the '26 "AC" tubes and the use of a "grid leak detector", as these do distort, and it is hard for me to listen to music on these sets.

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"Do Justly, love Mercy and walk humbly with your God"- Micah 6:8
"Let us begin to do good"- St. Francis
Best Regards, 
MrFixr55

[Arran]

Sorry;
I wanted to respond to Mr. Fix in the A.K model 46 thread but the thread was closed. I don't have a an A.K model in the 40 series but I have an American RCA Radiola 18, a Canadian Marconi Type 12, and a Canadian Westinghouse 58, all used the same tube lineup. The Radiola 18 we are all familiar with, other then the A.K 40 series models they are probably one of the most common AC operated "casket sets" of the 1920s. I think most of us have encountered at least one of each in our travels.
The Marconi Type 12 is basically the same set with a different chassis layout, and is a console rather then a table set, the tuber chassis is a square sheet of steel with angle iron spot welded to the edges to stiffen it. The tuning condenser is on top and is perpendicular to the front panel rather then parallel to it, and the tube sockets are parallel to the tuning condenser, three #26s and a #27 on one side, and a #26 and a #71A on the other. The RF coils, bypass condensers, and the audio transformers are on the bottom side, the rheostat and the tuning control are on the top side of the chassis. The part values and makers may be different from the Radiola 18, but it's essentially the same. This is not my set but another, I can't link to the Canadian Marconi home radio site pages for some reason so this was on R.M: https://www.radiomuseum.org/r/canadia_ma...ii_12.html
The Westinghouse model 58 is an odd one, it's basically a Canadian Westinghouse model 55, which was their version of a Radiola 20, converted to AC, with a socket power unit for a Radiola 17. So it uses the same tube lineup as a Radiola 17, or 18, but it has a regeneration control like a Radiola 20. It's also in a console cabinet with spindly legs. Unfortunately it needs a new volume control rheostat, which was similar to the Radiola 20 one, but it is missing, and I can't find a schematic to tell me what the value was, or how it was connected. I will assume it was in the antenna circuit like the Radiola 18 and the Marconi type 12, but I will not know for sure without tracing it out. Here is a similar one to mine on the ARF: https://antiqueradios.com/forums/viewtopic.php?t=447014
Regards
Arran