Emerson Unknown

8/10/2009 1:02:21 AMLou

Gentlemen:

I have recently acquired a small Emerson AM set. Looks like a late 1930's set with a small wooden case, 2 knobs and a small rotary dial with a square bezel.The speaker grill is a number of long vertical slots cut in the wooden case.

The tube lineup is ( and they ARE packed in!! ):

25Z6 Rect , 50L6 Audio , 6A8 Converyer, 6K7 IF, 6Q7 Det 1st Audio, #44 pilot lamp ( I think I got all of those right! ).This model does seem to have some line dropping resistance in the line cord.

Can anyone help me find the model number? The back is missing on this one and hence the model number.

Thanks in Advance
Lou

8/10/2009 2:15:41 AMWarren

Here is a link with a bunch of Emerson pictures. You might see it there, the models are listed also.

http://radioatticarchives.com/archive.htm?page=e2#Emerso

8/10/2009 7:20:03 AMEdd

Sir Lou. . . .

Running a data query on Yaxley reveals that Emerson was seen to be using a 25L6 in their lineup vice the 50L6. It should glow up quite BRILLLLLIANTLY for you , should you power up the set. The basic series string is at 300 Ma while the 50L6 would be a 150 ma tube.

The proir person might have been thinking of using that to reduce the filament drop requirement via that extra 25 volts in series BUT that would require the shunting of the 50L6 filament with a ~330 ohm resistor at a cool running 20 watts rating. However, that would STILL result in a filament string total of 93 V and still need another 30 volts dropped, if shooting for a conservative 123 VAC line voltage input figure.

Consulting the printout from Yaxley below, the YELLOW highlighting is designating the use of a 6SQ7 vice 6Q7, while some of the cases, refer to both numbers.

Also, the end column is the use of a 49 V dropper ballast, so if you don't see one of them being used , you could then eliminate all of those possibilities for being your model.

SOOOOO. . . .looks like you have quite a few model numbers to look up on ye olde REE-SOURCES section, to zero in on your specific model in queston.

73's de Edd

8/10/2009 9:50:27 AMNorm Leal

Hi Lou

I would add one thing to Edd comment. He is correct the 50L6 will be very bight but don't turn the radio on with this tube. Wait until you get a 25L6 for output.

The 50L6 may burn out as other tubes will add very little series resistance. Other tubes won't even light.

Norm

:Gentlemen:
:
:I have recently acquired a small Emerson AM set. Looks like a late 1930's set with a small wooden case, 2 knobs and a small rotary dial with a square bezel.The speaker grill is a number of long vertical slots cut in the wooden case.
:
:The tube lineup is ( and they ARE packed in!! ):
:
:25Z6 Rect , 50L6 Audio , 6A8 Converyer, 6K7 IF, 6Q7 Det 1st Audio, #44 pilot lamp ( I think I got all of those right! ).This model does seem to have some line dropping resistance in the line cord.
:
:Can anyone help me find the model number? The back is missing on this one and hence the model number.
:
:Thanks in Advance
:Lou
:
:
:

8/10/2009 9:55:28 AMNorm Leal

One thing you could do is use all 150 ma filament tubes. Then you wouldn't need series ballast resistance.

In that case leave the 50L6 and change others to 12 volt @ 150 ma tubes. 6A8 to 12A8, 6K7 to 12K7, 6Q7 to 12Q7, 25Z6 to 50Y6. Could use a 35L6 for 50L6. Either would work.

Norm

:Hi Lou
:
: I would add one thing to Edd comment. He is correct the 50L6 will be very bight but don't turn the radio on with this tube. Wait until you get a 25L6 for output.
:
: The 50L6 may burn out as other tubes will add very little series resistance. Other tubes won't even light.
:
:Norm
:
::Gentlemen:
::
::I have recently acquired a small Emerson AM set. Looks like a late 1930's set with a small wooden case, 2 knobs and a small rotary dial with a square bezel.The speaker grill is a number of long vertical slots cut in the wooden case.
::
::The tube lineup is ( and they ARE packed in!! ):
::
::25Z6 Rect , 50L6 Audio , 6A8 Converyer, 6K7 IF, 6Q7 Det 1st Audio, #44 pilot lamp ( I think I got all of those right! ).This model does seem to have some line dropping resistance in the line cord.
::
::Can anyone help me find the model number? The back is missing on this one and hence the model number.
::
::Thanks in Advance
::Lou
::
::
::
:

8/15/2009 3:44:21 AMLou

Hey Norm

Thanks for the input.

If I do change the string filament values, how to I keep the pilot lamp? There would be no available tap ready for the lamp.

Lou

:Hi
:
: One thing you could do is use all 150 ma filament tubes. Then you wouldn't need series ballast resistance.
:
: In that case leave the 50L6 and change others to 12 volt @ 150 ma tubes. 6A8 to 12A8, 6K7 to 12K7, 6Q7 to 12Q7, 25Z6 to 50Y6. Could use a 35L6 for 50L6. Either would work.
:
:Norm
:
::Hi Lou
::
:: I would add one thing to Edd comment. He is correct the 50L6 will be very bight but don't turn the radio on with this tube. Wait until you get a 25L6 for output.
::
:: The 50L6 may burn out as other tubes will add very little series resistance. Other tubes won't even light.
::
::Norm
::
:::Gentlemen:
:::
:::I have recently acquired a small Emerson AM set. Looks like a late 1930's set with a small wooden case, 2 knobs and a small rotary dial with a square bezel.The speaker grill is a number of long vertical slots cut in the wooden case.
:::
:::The tube lineup is ( and they ARE packed in!! ):
:::
:::25Z6 Rect , 50L6 Audio , 6A8 Converyer, 6K7 IF, 6Q7 Det 1st Audio, #44 pilot lamp ( I think I got all of those right! ).This model does seem to have some line dropping resistance in the line cord.
:::
:::Can anyone help me find the model number? The back is missing on this one and hence the model number.
:::
:::Thanks in Advance
:::Lou
:::
:::
:::
::
:

8/15/2009 11:16:07 AMWarren

If you have room for a 120 volt 4 watt night light bulb, that will solve the problem. A lot of radios use this as a dial lamp. Very little heat, just feels warm to the touch.

8/19/2009 4:56:25 PMLou

In case anyone is interested....

I decided to take out the old resistance line cord (that was broken anyway) and put in the appropriate values of power resistors to satisfy the drop requirement AND the pilot lamp. Not quite original but it will play and be safer!!

Lou

:If you have room for a 120 volt 4 watt night light bulb, that will solve the problem. A lot of radios use this as a dial lamp. Very little heat, just feels warm to the touch.
: