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Just got the above RCA 45 player 7-EY-1JF (coral and grey) in the shop for repair. No tubes are there, and there are 2 sockets---a 7 pin small socket rectifier(35W4?), and 8 pin large socket (possibly for a 25L6 type?), with a 270 ohm power resistor between them...anyone know the tubes needed here?
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: : :  : : : : : : : :Sir Brian Ceeee. . . . . . : : :Circa '56. : : :U must not have noticed that it is using a selenium rectifier, along with the motor winding acting as a drop for your series filament voltages and is in what I called a Charcoal Grey and Titty Pink case. :This info should also confirm the 7 pin mini pre amp tube used. : : :Also hope your cartridges output is still good, as well as the odd shaped cycling cam located down below, is still good and not cracked across. : : :On page referencing: : : : : : :  : : : : : :73's de Edd : : :  : |
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:Just got the above RCA 45 player 7-EY-1JF (coral and grey) in the shop for repair. No tubes are there, and there are 2 sockets---a 7 pin small socket rectifier(35W4?), and 8 pin large socket (possibly for a 25L6 type?), with a 270 ohm power resistor between them...anyone know the tubes needed here?
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:: :: :: :: :: :: :: :: :: :: ::Sir Brian Ceeee. . . . . . :: :: ::Circa '56. :: :: ::U must not have noticed that it is using a selenium rectifier, along with the motor winding acting as a drop for your series filament voltages and is in what I called a Charcoal Grey and Titty Pink case. ::This info should also confirm the 7 pin mini pre amp tube used. :: :: ::Also hope your cartridges output is still good, as well as the odd shaped cycling cam located down below, is still good and not cracked across. :: :: ::On page referencing: :: :: :: :: :: :: :: :: :: :: :: ::73's de Edd :: :: :: :: |
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::Just got the above RCA 45 player 7-EY-1JF (coral and grey) in the shop for repair. No tubes are there, and there are 2 sockets---a 7 pin small socket rectifier(35W4?), and 8 pin large socket (possibly for a 25L6 type?), with a 270 ohm power resistor between them...anyone know the tubes needed here?
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::: ::: ::: ::: ::: ::: ::: ::: ::: ::: :::Sir Brian Ceeee. . . . . . ::: ::: :::Circa '56. ::: ::: :::U must not have noticed that it is using a selenium rectifier, along with the motor winding acting as a drop for your series filament voltages and is in what I called a Charcoal Grey and Titty Pink case. :::This info should also confirm the 7 pin mini pre amp tube used. ::: ::: :::Also hope your cartridges output is still good, as well as the odd shaped cycling cam located down below, is still good and not cracked across. ::: ::: :::On page referencing: ::: ::: ::: ::: ::: ::: ::: ::: ::: ::: ::: :::73's de Edd ::: ::: ::: ::: |
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:::Just got the above RCA 45 player 7-EY-1JF (coral and grey) in the shop for repair. No tubes are there, and there are 2 sockets---a 7 pin small socket rectifier(35W4?), and 8 pin large socket (possibly for a 25L6 type?), with a 270 ohm power resistor between them...anyone know the tubes needed here?
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I've messed up my replies to EDD..I'll start over
Your circuit won't use a 25L6 and 35W4. 25L6 has a 300 ma filament and 35W4 150 ma. If you already have a selenium rectifier the 7 pin tube wouldn't be 35W4.
Edd supplied a nice circuit but if it isn't the same how is your 7 pin tube wired? What pins are used? May use a pentode like 6AU6 rather than triode?
Norm
::Just got the above RCA 45 player 7-EY-1JF (coral and grey) in the shop for repair. No tubes are there, and there are 2 sockets---a 7 pin small socket rectifier(35W4?), and 8 pin large socket (possibly for a 25L6 type?), with a 270 ohm power resistor between them...anyone know the tubes needed here?
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:I've messed up my replies to EDD..I'll start over
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No selenium rectfier on this puppy. The wiring on the socket is set up for a rect. tube. I found a pic of the exact chassis on the net, but can't see the tube #'s....http://antiqueradios.com/gallery/v/temp/7-EY-1EF.jpg.html.......(the power resistor is 270 ohm)I also found a closer schematic, which is a one tube set (25L6) with a selenium rect, which I could maybe copy, using a diode and resistor...Can you suggest another O/P tube to go with a 35W4 in this circuit that may work, or another similar rect/OP tube combo? It looks like 25L6's were used in this chassis.......:Hi Brian
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: Your circuit won't use a 25L6 and 35W4. 25L6 has a 300 ma filament and 35W4 150 ma. If you already have a selenium rectifier the 7 pin tube wouldn't be 35W4.
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: Edd supplied a nice circuit but if it isn't the same how is your 7 pin tube wired? What pins are used? May use a pentode like 6AU6 rather than triode?
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:Norm
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:::Just got the above RCA 45 player 7-EY-1JF (coral and grey) in the shop for repair. No tubes are there, and there are 2 sockets---a 7 pin small socket rectifier(35W4?), and 8 pin large socket (possibly for a 25L6 type?), with a 270 ohm power resistor between them...anyone know the tubes needed here?
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::I've messed up my replies to EDD..I'll start over
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Since you think 35W4 is correct try 35L6 or 50L6 in the other socket. Even though higher voltage current is 150 ma, same as 34W4. This tube will heat much faster.
Norm
::HI Norm,
:No selenium rectfier on this puppy. The wiring on the socket is set up for a rect. tube. I found a pic of the exact chassis on the net, but can't see the tube #'s....http://antiqueradios.com/gallery/v/temp/7-EY-1EF.jpg.html.......(the power resistor is 270 ohm)I also found a closer schematic, which is a one tube set (25L6) with a selenium rect, which I could maybe copy, using a diode and resistor...Can you suggest another O/P tube to go with a 35W4 in this circuit that may work, or another similar rect/OP tube combo? It looks like 25L6's were used in this chassis.......:Hi Brian
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:: Your circuit won't use a 25L6 and 35W4. 25L6 has a 300 ma filament and 35W4 150 ma. If you already have a selenium rectifier the 7 pin tube wouldn't be 35W4.
::
:: Edd supplied a nice circuit but if it isn't the same how is your 7 pin tube wired? What pins are used? May use a pentode like 6AU6 rather than triode?
::
::Norm
::
::::Just got the above RCA 45 player 7-EY-1JF (coral and grey) in the shop for repair. No tubes are there, and there are 2 sockets---a 7 pin small socket rectifier(35W4?), and 8 pin large socket (possibly for a 25L6 type?), with a 270 ohm power resistor between them...anyone know the tubes needed here?
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:::I've messed up my replies to EDD..I'll start over
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Wel l l l l, I 'jes dun' went and looked up what the index said should be the chassis in that model number and the tube sockets given, all jibed with the schematics layouts. (Along with most later units then being . . . . STEEE-ROWWWWW.) If yours is using the 35W4 with its #7 output routing to the filter cap(s) then that would be dependent upon the 35W4 being shunted with an ~ 235 ohm power resistor to balance out the filament current differentialities( 150 ma VS 300 ma)and then the special winding of the resistance of the motor winding to make up the excess filament dropping resistance. You should be able to now ascertain if the two filaments measure the proper AC voltage across them and the B+ being proper at the screen and plate of the 25L6. |
:Hi Brian : :::
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: Since you think 35W4 is correct try 35L6 or 50L6 in the other socket. Even though higher voltage current is 150 ma, same as 34W4. This tube will heat much faster.
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:Norm
:::HI Norm,
::No selenium rectfier on this puppy. The wiring on the socket is set up for a rect. tube. I found a pic of the exact chassis on the net, but can't see the tube #'s....http://antiqueradios.com/gallery/v/temp/7-EY-1EF.jpg.html.......(the power resistor is 270 ohm)I also found a closer schematic, which is a one tube set (25L6) with a selenium rect, which I could maybe copy, using a diode and resistor...Can you suggest another O/P tube to go with a 35W4 in this circuit that may work, or another similar rect/OP tube combo? It looks like 25L6's were used in this chassis.......
:Hi Brian
:::
::: Your circuit won't use a 25L6 and 35W4. 25L6 has a 300 ma filament and 35W4 150 ma. If you already have a selenium rectifier the 7 pin tube wouldn't be 35W4.
:::
::: Edd supplied a nice circuit but if it isn't the same how is your 7 pin tube wired? What pins are used? May use a pentode like 6AU6 rather than triode?
:::
:::Norm
:::::Just got the above RCA 45 player 7-EY-1JF (coral and grey) in the shop for repair. No tubes are there, and there are 2 sockets---a 7 pin small socket rectifier(35W4?), and 8 pin large socket (possibly for a 25L6 type?), with a 270 ohm power resistor between them...anyone know the tubes needed here?
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::::I've messed up my replies to EDD..I'll start over
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Clifton
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:Sir Brian Ceeee. . . . . .
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:Wel l l l l, I 'jes dun' went and looked up what the index said should be the chassis in that model number and the tube sockets given, all jibed with the schematics layouts.
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:I just now went back as far as '54 to as late as '58 and none of them used what you seem to have in that set.
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:I found a possible 14 different chassis variants , but by '58 they had all shifted to using 50C5 's for their output tubes, instead of the 25L6's.
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:(Along with most later units then being . . . . STEEE-ROWWWWW.)
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: I was alternatively seeing the cartridge . . . HIGH output . . I must say . . .going right to the volume control and then into the #5 of the 25L6 or else, other circuits were additionally incorporating the 6AT6 preamp.
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:If yours is using the 35W4 with its #7 output routing to the filter cap(s) then that would be dependent upon the 35W4 being shunted with an ~ 235 ohm power resistor to balance out the filament current differentialities( 150 ma VS 300 ma)and then the special winding of the resistance of the motor winding to make up the excess filament dropping resistance.
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:Or the AF output tube being a 35 or 50L6 would result in creation of a 150 ma series string.
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:You should be able to now ascertain if the two filaments measure the proper AC voltage across them and the B+ being proper at the screen and plate of the 25L6.
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:And to see if the amp is working by going halfway between the filaments of the 35W4/25L6, putting a jumper wire to that junction and connect to an .001 paper cap at + 400 breakdown rating and then touching the other lead of the cap to the #5 of the 'L6. The resultant square wave HUMMMMMMM should then certainly let you know about the amplification auspices of that stage.
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:I feel that the grid drive to the 25L6 would be inadequate with the old finger to the top of the volume control technique.
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:And then . . . AND THEN !. . along came Jones . . . . no . . no . . .that's The Coasters . . .wrong situation . . .
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:And THEN, you attempt getting scratchy-scratchy noises with fondly stroking the needle in the cartridge . . . . but I'm then really expecting you to find that units antique cartridge to be quite weak or dead . . . . bummer !
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:Now . . . depending on yours' (and Elmer Fudd's) "vewy-vewy" close examination and any feed back . . .
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:73's de Edd
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::Hi Brian
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:: Since you think 35W4 is correct try 35L6 or 50L6 in the other socket. Even though higher voltage current is 150 ma, same as 34W4. This tube will heat much faster.
::
::Norm
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::::HI Norm,
:::No selenium rectfier on this puppy. The wiring on the socket is set up for a rect. tube. I found a pic of the exact chassis on the net, but can't see the tube #'s....http://antiqueradios.com/gallery/v/temp/7-EY-1EF.jpg.html.......(the power resistor is 270 ohm)I also found a closer schematic, which is a one tube set (25L6) with a selenium rect, which I could maybe copy, using a diode and resistor...Can you suggest another O/P tube to go with a 35W4 in this circuit that may work, or another similar rect/OP tube combo? It looks like 25L6's were used in this chassis.......
:
:
::Hi Brian
::::
:::: Your circuit won't use a 25L6 and 35W4. 25L6 has a 300 ma filament and 35W4 150 ma. If you already have a selenium rectifier the 7 pin tube wouldn't be 35W4.
::::
:::: Edd supplied a nice circuit but if it isn't the same how is your 7 pin tube wired? What pins are used? May use a pentode like 6AU6 rather than triode?
::::
::::Norm
:
:
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::::
::::::Just got the above RCA 45 player 7-EY-1JF (coral and grey) in the shop for repair. No tubes are there, and there are 2 sockets---a 7 pin small socket rectifier(35W4?), and 8 pin large socket (possibly for a 25L6 type?), with a 270 ohm power resistor between them...anyone know the tubes needed here?
::::::
:::::I've messed up my replies to EDD..I'll start over
:::::
::::
:::
::
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FR
FR
:It would seem that if it has been determined that a 35W4 rectifier with 150 ma filament is used that in a series filament circuit the other tube would also be a 150 ma filament tube. If the filament circuit current is 150 ma, then the voltage drop across the 270 Ohm resistor would be approximately 40 volts (V=.150*270). If the two tubes are rated at 35 volts each (35W4 & 35L6), then adding the calculated voltage drop across the resistor to the voltage drop across the two tubes would total approximately 110 volts which possibly may be the devices rated input voltage during the time frame it was manufactured - middle 50s????
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:Clifton
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::Sir Brian Ceeee. . . . . .
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::Wel l l l l, I 'jes dun' went and looked up what the index said should be the chassis in that model number and the tube sockets given, all jibed with the schematics layouts.
::
::
::I just now went back as far as '54 to as late as '58 and none of them used what you seem to have in that set.
::
::
::I found a possible 14 different chassis variants , but by '58 they had all shifted to using 50C5 's for their output tubes, instead of the 25L6's.
::
::(Along with most later units then being . . . . STEEE-ROWWWWW.)
::
::
:: I was alternatively seeing the cartridge . . . HIGH output . . I must say . . .going right to the volume control and then into the #5 of the 25L6 or else, other circuits were additionally incorporating the 6AT6 preamp.
::
::
::
::If yours is using the 35W4 with its #7 output routing to the filter cap(s) then that would be dependent upon the 35W4 being shunted with an ~ 235 ohm power resistor to balance out the filament current differentialities( 150 ma VS 300 ma)and then the special winding of the resistance of the motor winding to make up the excess filament dropping resistance.
::
::
::Or the AF output tube being a 35 or 50L6 would result in creation of a 150 ma series string.
::
::
::
::You should be able to now ascertain if the two filaments measure the proper AC voltage across them and the B+ being proper at the screen and plate of the 25L6.
::
::
::And to see if the amp is working by going halfway between the filaments of the 35W4/25L6, putting a jumper wire to that junction and connect to an .001 paper cap at + 400 breakdown rating and then touching the other lead of the cap to the #5 of the 'L6. The resultant square wave HUMMMMMMM should then certainly let you know about the amplification auspices of that stage.
::
::
::I feel that the grid drive to the 25L6 would be inadequate with the old finger to the top of the volume control technique.
::
::
::And then . . . AND THEN !. . along came Jones . . . . no . . no . . .that's The Coasters . . .wrong situation . . .
::
::
::And THEN, you attempt getting scratchy-scratchy noises with fondly stroking the needle in the cartridge . . . . but I'm then really expecting you to find that units antique cartridge to be quite weak or dead . . . . bummer !
::
::
::Now . . . depending on yours' (and Elmer Fudd's) "vewy-vewy" close examination and any feed back . . .
::
::
::
::
::
::73's de Edd
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:::Hi Brian
:::
::: Since you think 35W4 is correct try 35L6 or 50L6 in the other socket. Even though higher voltage current is 150 ma, same as 34W4. This tube will heat much faster.
:::
:::Norm
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::
:::
:::::HI Norm,
::::No selenium rectfier on this puppy. The wiring on the socket is set up for a rect. tube. I found a pic of the exact chassis on the net, but can't see the tube #'s....http://antiqueradios.com/gallery/v/temp/7-EY-1EF.jpg.html.......(the power resistor is 270 ohm)I also found a closer schematic, which is a one tube set (25L6) with a selenium rect, which I could maybe copy, using a diode and resistor...Can you suggest another O/P tube to go with a 35W4 in this circuit that may work, or another similar rect/OP tube combo? It looks like 25L6's were used in this chassis.......
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:::Hi Brian
:::::
::::: Your circuit won't use a 25L6 and 35W4. 25L6 has a 300 ma filament and 35W4 150 ma. If you already have a selenium rectifier the 7 pin tube wouldn't be 35W4.
:::::
::::: Edd supplied a nice circuit but if it isn't the same how is your 7 pin tube wired? What pins are used? May use a pentode like 6AU6 rather than triode?
:::::
:::::Norm
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::
::
:::::
:::::::Just got the above RCA 45 player 7-EY-1JF (coral and grey) in the shop for repair. No tubes are there, and there are 2 sockets---a 7 pin small socket rectifier(35W4?), and 8 pin large socket (possibly for a 25L6 type?), with a 270 ohm power resistor between them...anyone know the tubes needed here?
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::::::I've messed up my replies to EDD..I'll start over
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I have a 7-ey 1 dj 2 tube player,
has a 35w4 & 50l6gt,not sure about power resistor