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60B Version 5

60B ; Philco, Philadelphia (ID = 528278) Radio
 
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60B ; Philco, Philadelphia (ID = 840230) Radio
Philco, Philadelphia: 60B [Radio] ID = 840230 746x933
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For model 60B Version 5, Philco, Philadelphia Stg. Batt. Co.; USA
 
Country:  United States of America (USA)
Manufacturer / Brand:  Philco, Philadelphia Stg. Batt. Co.; USA
Year: 1935 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 5: 6A7 78 75 42 80
Main principle Super-Heterodyne (Super in general); ZF/IF 460 kHz
Wave bands Broadcast (MW), Police, sometimes also early TV (75-200m).
Details
Power type and voltage Alternating Current supply (AC) / 115 Volt
Loudspeaker Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
Power out
from Radiomuseum.org Model: 60B [Version 5] - Philco, Philadelphia Stg. Batt
Material Wooden case
Shape Table-Cathedral-Type (upright, round top or gothic arch, not rounded edges only).
Notes The Philco model 60 series included nine versions over four years, all using similar 5-tube chassis.

There were six versions of the 60B cathedral. Version 1 (1933) had the simpler flat-front version of the classic cathedral cabinet with spade-shaped speaker grill which was used on many 1933 models. Version 2 (1934) had three vertical bars through the center of the center of the speaker grill, with short downward curving arcs added at the bottom of the speaker. Versions 3 and 4 (1934-35) had similar cabinets with an oval shaped speaker grill with a stair-step pattern; version 3 had a metal escutcheon with "Philco" stamped into the metal, and version 4 had a black bakelite escutcheon with a "Philco" decal on the center of the wooden front. Version 5 (1935) had the same cabinet as versions 3 and 4, but with a larger black bakelite escutcheon and a new dial scale design. Version 6 (1936) was a new style cabinet with a continuous arch from the base of the cabinet.

Model 60MB (1934) was a tombstone with a modern design, having three downward facing arcs through the speaker grill and hexagonal knobs.

Model 60L (1933-35) was an ornate lowboy with four vertical bars through the speaker grill and other embellishment.

Model 60F (1935-36) was a floor-type console with a tulip-shaped speaker grill.

The general spirit of the model 60 series continued into 1937 and 1938 with models 37-60 and 38-60, which were also 5-tube 2-band radios.
Collectors' prices  
Source of data Philco Radio 1928-1942
Circuit diagram reference Rider's Perpetual, Volume 4 = ca. 1934 and before
Mentioned in Machine Age to Jet Age II (page 211.)
Literature/Schematics (1) Philco 1928-36 Wiring Diagrams, Parts Lists, and Essential Service Data
Literature/Schematics (2) Cathedral & Tombstone Radios (page 192.)

Model page created by Thomas Albrecht. See "Data change" for further contributors.



All listed radios etc. from Philco, Philadelphia Stg. Batt. Co.; USA
Here you find 3716 models, 2087 with images and 3097 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.



 


Forum contributions about this model
Philco, Philadelphia: 60B
Threads: 1 | Posts: 5
Hits: 418     Replies: 4
philco: Strange problem with the power transformer.
Meyer Rochwerger
02.Sep.18
  1

I've just restored a Philco 60B and put it to a long time working test.
After some time of normal operation, it suddenly stopped and presented a frying noise coming from the transformer.
I turned it off and made an inspection looking for a possible short on the B + circuits.
Everything was as it should be.
Removing the 80 tube, the noise stops.
Disconnecting the B+ power line to the rest of the circuit and puting the 80 tube in it's place the frying noise come back.
I measured all AC voltages of the transformer without the 80, and all are ok.
All the Ohmic resistances of the windings are ok too.
I also measured the insulation between the windings and did not notice anything abnormal.
Thus I came to the conclusion that there is a sparking between the 350 and 4.8 windings. The sparking occurs only when the 80 is in place.


Bad news for me ... The power transformer must be redone.

Cheers,

Meyer

 

Michael Watterson
02.Sep.18
  2

You could try a separate isolated supply, maybe even 3 x D Cells if you have nothing else.
Also if you have an capacitor high voltage leakage tester you can test for leakage between the windings.
Assuming you don't have a known good type 80 tube to swap. As you say, it seems like a transformer issue. I once "fixed" a transformer that was intermittent by immersion in very hot polyurethane yacht varnish.

Meyer Rochwerger
02.Sep.18
  3

Hi Michael,
I have a tube tester, and the 80 is fine. In spite of this I put another one (NOS) that I have and nothing has changed. I'm going to pull the transformer out of the chassis and take it apart to see if there's anything that I can do without rewind it.

Thanks for you interest

Bob Albert
18.Sep.18
  4

Before rewinding the transformer, I would look at the filter capacitors.  Electrolytic capacitors have always been a source of trouble after a few years and I suspect that may be the problem here.

 

When you disconnect the B+ from the rectifier output, do you also disconnect the filter capacitors?  The frying noise may be coming from the capacitor.  With your hand, see if the capacitor is warm.  In general, if it's more than a few years old, replace it.

 

Bob

Rüdiger Walz
18.Sep.18
  5

Hello,

obviously the heater windings of the 80 are elevated to several hundred volts positive if you plug-in the 80. Without rectifier the level of the 4.8 V windings is more or less free.

If there is an insulation failiure to the chassis or the heater windings for the other tubes you may have sparks.

Also a failiure of the insulation paper between 4.8 windings and the 350 windings may cause sparks because one end of the 350 winding is always several hundred volts negative to the heater if the 80 is pluged in.

In German transformers these windings are on the top and easily accessible and can be repaired without rewinding of the whole transformer.

 
Philco, Philadelphia: 60B
End of forum contributions about this model

  
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