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7T10 (-N) Ch= 5K1 (UL5K1) Octal and Loctal

7T10 Ch= 5K1 ; Admiral brand (ID = 85794) Radio
 
7T10 Ch= 5K1 ; Admiral brand (ID = 372097) Radio
 
7T10 Ch= 5K1 ; Admiral brand (ID = 372098) Radio
 
7T10 Ch= 5K1 ; Admiral brand (ID = 372099) Radio
 
7T10 Ch= 5K1 ; Admiral brand (ID = 372100) Radio
 
7T10 Ch= 5K1 ; Admiral brand (ID = 915829) Radio
 
7T10 Ch= 5K1 ; Admiral brand (ID = 915830) Radio
 
7T10 Ch= 5K1 ; Admiral brand (ID = 915831) Radio
 
7T10 Ch= 5K1 ; Admiral brand (ID = 915832) Radio
7T10 Ch= 5K1 ; Admiral brand (ID = 1874122) Radio 7T10 Ch= 5K1 ; Admiral brand (ID = 93865) Radio
7T10 Ch= 5K1 ; Admiral brand (ID = 93867) Radio 7T10 Ch= 5K1 ; Admiral brand (ID = 93868) Radio
7T10 Ch= 5K1 ; Admiral brand (ID = 275573) Radio 7T10 Ch= 5K1 ; Admiral brand (ID = 275574) Radio
7T10 Ch= 5K1 ; Admiral brand (ID = 915828) Radio 7T10 Ch= 5K1 ; Admiral brand (ID = 1209879) Radio
7T10 Ch= 5K1 ; Admiral brand (ID = 464865) Radio 7T10 Ch= 5K1 ; Admiral brand (ID = 464866) Radio
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7T10 Ch= 5K1 ; Admiral brand (ID = 1874122) Radio
Admiral brand: 7T10 Ch= 5K1 [Radio] ID = 1874122 800x635
Select picture or schematic to display from thumbnails on the right and click for download.
For model 7T10 (-N) Ch= 5K1 (UL5K1) Octal and Loctal, Admiral (brand) Continental Radio & Television Co.; Chicago, IL:
American Radio Design Greg Mercurio
 
Country:  United States of America (USA)
Manufacturer / Brand:  Admiral (brand) Continental Radio & Television Co.; Chicago, IL
alternative name
 
Continental Radio & TV
Year: 1947/1948 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 5: 12SA7 12SK7 14B6 50A5 35Y4
Main principle Super-Heterodyne (Super in general); ZF/IF 455 kHz
Tuned circuits 6 AM circuit(s)
Wave bands Broadcast only (MW).
Details
Power type and voltage AC/DC-set / 117 Volt
Loudspeaker Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 5 inch = 12.7 cm
Power out
from Radiomuseum.org Model: 7T10 Ch= 5K1 [Octal and Loctal] - Admiral brand Continental
Material Bakelite case
Shape Tablemodel, Mantel/Midget/Compact up to 14" width, but not a Portable (See power data. Sometimes with handle but for mains only).
Dimensions (WHD) 13 x 8 x 7 inch / 330 x 203 x 178 mm
Notes

Built-in loop antenna. There is also a variant which employs Octall tubes only.

Colors:

  • 7T10E = ebony / black
  • 7T10M = mahogany
  • 7T10C = ivory
  • ebony w/ ivory louver (mentioned in Rider's 17)
  • ivory w/ ebony louver (mentioned in Rider's 17)

The difference between models with and without -N suffix is currently unknown.

Net weight (2.2 lb = 1 kg) 6 lb 8 oz (6.5 lb) / 2.951 kg
Price in first year of sale 19.95 $
Collectors' prices  
External source of data Ernst Erb
Source of data Collector's Guide to Antique Radios 4. Edition
Circuit diagram reference Rider's Perpetual, Volume 17 = 1948 and before
Mentioned in The Radio Collector's Directory and Price Guide 1921 - 1965
Literature/Schematics (2) Radio Retailing (Radio & Television R.) (Jun 1947 p.20 and Sep 1947 p.19)
Literature/Schematics (3) Rider's Perpetual, Volume 22 = covering 1951
Literature/Schematics (4) Photofact Folder, Howard W. SAMS (Set 30, Date 12/47, Folder 4720-1)


All listed radios etc. from Admiral (brand) Continental Radio & Television Co.; Chicago, IL
Here you find 2804 models, 1159 with images and 2146 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.



 


Forum contributions about this model
Admiral brand: 7T10 Ch= 5K1
Threads: 1 | Posts: 2
Hits: 1348     Replies: 1
admiral: Ch= 5K1; 7T10
Tim Dees
07.Mar.12
  1

This is my first post, and I'm a beginner.  I got this radio out of a barn loft and I'm guessing it hasn't been used in 30 to 40 years.  I opened it up and saw that the speaker cone had been eaten out and a blown capacitor was hanging loose.  I decided to restore this radio.  I replaced all of the paper capacitors with new modern capacitors.  I found a used speaker on ebay which was the same model.  I just got finished with it and turned it on and to my joy it warmed up quickly and I started receiveing stations right away.  My question is, is it normal in an old am radio to get signal bleeds of other stations trying to come in on the same frequency?  I live about 35 miles from a big city and get some of the stations very strong, but with other stations being lightly heard trying to come in on that frequency also.  I've picked up stations in other states also, with the same problem.  I have not done anything else to the radio other than clean the tuner with contact cleaner.  It was dirty and a little corroded.  When I rotate the dial, it moves freely after using the contact cleaner.  The sound is great and nice volume without distortion.

Thomas Albrecht
10.Mar.12
  2

Tim,

Welcome to the hobby of antique radio restoration!  Your radio is a perfect example of an "All American Five" - a very common radio design used from about 1946 through the end of the tube era in the 1960s.  They had five tubes in a series filament string and no power transformer.

It is not really normal for the radio to have poor selectivity.  Basically this radio should function as well as any modern radio as far as separating stations is concerned.  It's not immediately obvious what the problem is.

As you tune the dial, is the tuning for each station quite sharp, as it should be?  That is, does the station only come in at a very specific position on the dial, in a very narrow range?  If the tuning of stations is pretty broad, the IF transformers might not be very well aligned.  To fix this (in a crude fashion, but it works OK for a radio like this), tune in a very weak station, and then adjust the two trimmer capacitors on top of each of the IF transformers for maximum signal strength.  Each adjustment screw should have a very definite peak.  If you find that any of these screws does not have a definite peak in signal strength, there may be a problem with that IF transformer.

Another possibility is that the loop antenna is not connected properly.  One way to tell is whether the "RF" or "antenna" trimmer on the main tuning capacitor shows a definite peak when tuning a weak station near the upper end of the dial.  On the side of the tuning capacitor, you will find two adjustment screws, each of which compresses a mica trimmer capacitor.  The one adjacent to the larger set of plates on the tuning capacitor is the "antenna" trimmer.  See if you get a peak (perhaps not particularly sharp, but still a peak) when adjusting this on a weak station near the high frequency end of the dial.  If this trimmer has no effect, there may be a problem with the loop antenna.

Do stations come in at the proper frequency position on the dial?

Best regards,

Tom

 
Admiral brand: 7T10 Ch= 5K1
End of forum contributions about this model

  
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