I'm still working on the GLF. There are two odd looking parts attached to the 7F8. I cannot tell what they are. One looks like a shortened resistor. But I think it's a capacitor. One looks like an old fashioned resistor but I think it's a coil. Here is a picture of them. One is in the middle from left to right on top. One is to the right of it in a vertical position.
If this doesn't work, I put the picture on this page:
http://web.mac.com/davesantiqueradio/Site_2/whatsit.html
Thanks,
Dave
I'll try it again:
I think this will work now.
Thanks,
Dave
:Hello All,
: I'm still working on the GLF. There are two odd looking parts attached to the 7F8. I cannot tell what they are. One looks like a shortened resistor. But I think it's a capacitor. One looks like an old fashioned resistor but I think it's a coil. Here is a picture of them. One is in the middle from left to right on top. One is to the right of it in a vertical position.
:
:
:
:If this doesn't work, I put the picture on this page:
:
:http://web.mac.com/davesantiqueradio/Site_2/whatsit.html
:
:Thanks,
:
:Dave
Sir David:
Guess that you are probably working by the seat of the pants. . . .sans schematic. . . .on that one and the 7F8 being your
local osc mixer on the set . EXTREME probability of no problems with that cluster of parts you have displayed,
I initially see the radial ceramic “dogbone “ capacitor being on the top right corner. . .color coding suggesting 5 or 50 pf tied in to that tubes first grid circuitry and its ancillary 47K grid resistor.
Yet another casing variant style of a family of ceramic capacitor to its left. Probably a 1.5 pf, that feeds osc output into the first grid of the mixer section of the 7F8and seems like there is yet another of that same type that is waaaay down at the bottom left arrow.
The left sides ? mark up seems to be possibly a low value isolation inductor for the #7 filament supply line, with its #2 filament being grounded .
Now, is the whole receiver dead or just the FM section ?
73's de Edd
The FM section is alive, however I can't tune anything. I hear the FM hiss and can touch the coils to the right of this tube, which are connected to the tuning capacitor. It does bring in some FM but it's just a lot of FM stations together. The coil is just a large loop of aluminum. There was a ferrite slug that can be adjusted so that it moves close to one side of the loop. There is another coil like it but the ferrite isn't missing. But I don't think that's the problem. But it sounds like it almost works. If I touch one of the leads of the IF transformer which connects to the 7F8, the his can really get loud. I think it almost works. There's probably some small problem.
AM (BC) works fine and so does the Amplifier of course. The tuning eye closes only of very very strong stations. Weaker ones just move (close) it a little.
I can take more pictures if you need them. I think that our forum might be interested as well. This is a somewhat interesting set.
Thanks,
Dave
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:Sir David:
:
:Guess that you are probably working by the seat of the pants. . . .sans schematic. . . .on that one and the 7F8 being your
: local osc mixer on the set . EXTREME probability of no problems with that cluster of parts you have displayed,
:
:
:I initially see the radial ceramic “dogbone “ capacitor being on the top right corner. . .color coding suggesting 5 or 50 pf tied in to that tubes first grid circuitry and its ancillary 47K grid resistor.
:Yet another casing variant style of a family of ceramic capacitor to its left. Probably a 1.5 pf, that feeds osc output into the first grid of the mixer section of the 7F8and seems like there is yet another of that same type that is waaaay down at the bottom left arrow.
:
:
:The left sides ? mark up seems to be possibly a low value isolation inductor for the #7 filament supply line, with its #2 filament being grounded .
:
:
:Now, is the whole receiver dead or just the FM section ?
:
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:
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:73's de Edd
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Should I post more pictures?
Thanks,
Dave
:Edd,
: The FM section is alive, however I can't tune anything. I hear the FM hiss and can touch the coils to the right of this tube, which are connected to the tuning capacitor. It does bring in some FM but it's just a lot of FM stations together. The coil is just a large loop of aluminum. There was a ferrite slug that can be adjusted so that it moves close to one side of the loop. There is another coil like it but the ferrite isn't missing. But I don't think that's the problem. But it sounds like it almost works. If I touch one of the leads of the IF transformer which connects to the 7F8, the his can really get loud. I think it almost works. There's probably some small problem.
: AM (BC) works fine and so does the Amplifier of course. The tuning eye closes only of very very strong stations. Weaker ones just move (close) it a little.
: I can take more pictures if you need them. I think that our forum might be interested as well. This is a somewhat interesting set.
:
:Thanks,
:
:Dave
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::Sir David:
::
::Guess that you are probably working by the seat of the pants. . . .sans schematic. . . .on that one and the 7F8 being your
:: local osc mixer on the set . EXTREME probability of no problems with that cluster of parts you have displayed,
::
::
::I initially see the radial ceramic “dogbone “ capacitor being on the top right corner. . .color coding suggesting 5 or 50 pf tied in to that tubes first grid circuitry and its ancillary 47K grid resistor.
::Yet another casing variant style of a family of ceramic capacitor to its left. Probably a 1.5 pf, that feeds osc output into the first grid of the mixer section of the 7F8and seems like there is yet another of that same type that is waaaay down at the bottom left arrow.
::
::
::The left sides ? mark up seems to be possibly a low value isolation inductor for the #7 filament supply line, with its #2 filament being grounded .
::
::
::Now, is the whole receiver dead or just the FM section ?
::
::
::
::
::
::
::
::
::
::
::
::
::
::
::73's de Edd
::
::
::
::
::
One of the tuning slugs is missing. All that's left is the holder that the threads go on to move it in the coil. So this is a ferrite cylinder with a smaller diameter threaded rod attached to one end.
Does anyone know where I can find one to use as a replacement?
Thanks,
Dave
:Edd,
: Should I post more pictures?
:
:Thanks,
:
:Dave
::Edd,
:: The FM section is alive, however I can't tune anything. I hear the FM hiss and can touch the coils to the right of this tube, which are connected to the tuning capacitor. It does bring in some FM but it's just a lot of FM stations together. The coil is just a large loop of aluminum. There was a ferrite slug that can be adjusted so that it moves close to one side of the loop. There is another coil like it but the ferrite isn't missing. But I don't think that's the problem. But it sounds like it almost works. If I touch one of the leads of the IF transformer which connects to the 7F8, the his can really get loud. I think it almost works. There's probably some small problem.
:: AM (BC) works fine and so does the Amplifier of course. The tuning eye closes only of very very strong stations. Weaker ones just move (close) it a little.
:: I can take more pictures if you need them. I think that our forum might be interested as well. This is a somewhat interesting set.
::
::Thanks,
::
::Dave
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::Sir David:
:::
:::Guess that you are probably working by the seat of the pants. . . .sans schematic. . . .on that one and the 7F8 being your
::: local osc mixer on the set . EXTREME probability of no problems with that cluster of parts you have displayed,
:::
:::
:::I initially see the radial ceramic “dogbone “ capacitor being on the top right corner. . .color coding suggesting 5 or 50 pf tied in to that tubes first grid circuitry and its ancillary 47K grid resistor.
:::Yet another casing variant style of a family of ceramic capacitor to its left. Probably a 1.5 pf, that feeds osc output into the first grid of the mixer section of the 7F8and seems like there is yet another of that same type that is waaaay down at the bottom left arrow.
:::
:::
:::The left sides ? mark up seems to be possibly a low value isolation inductor for the #7 filament supply line, with its #2 filament being grounded .
:::
:::
:::Now, is the whole receiver dead or just the FM section ?
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::73's de Edd
:::
:::
:::
:::
:::
:One of the tuning slugs is missing. All that's left is the holder that the threads go on to move it in the coil. So this is a ferrite cylinder with a smaller diameter threaded rod attached to one end.
: Does anyone know where I can find one to use as a replacement?
:
:Thanks,
:
:Dave
Dave:
If you have a signal generator, connect the thing to the antenna and tune it all over the place and see if the missing slug is in the oscillator, and it may be tuning GOKW.
Lewis
::Edd,
:: Should I post more pictures?
::
::Thanks,
::
::Dave
:::Edd,
::: The FM section is alive, however I can't tune anything. I hear the FM hiss and can touch the coils to the right of this tube, which are connected to the tuning capacitor. It does bring in some FM but it's just a lot of FM stations together. The coil is just a large loop of aluminum. There was a ferrite slug that can be adjusted so that it moves close to one side of the loop. There is another coil like it but the ferrite isn't missing. But I don't think that's the problem. But it sounds like it almost works. If I touch one of the leads of the IF transformer which connects to the 7F8, the his can really get loud. I think it almost works. There's probably some small problem.
::: AM (BC) works fine and so does the Amplifier of course. The tuning eye closes only of very very strong stations. Weaker ones just move (close) it a little.
::: I can take more pictures if you need them. I think that our forum might be interested as well. This is a somewhat interesting set.
:::
:::Thanks,
:::
:::Dave
::::
::::
::::
::::
::::
::::
::::
::::
::::
::::
::::Sir David:
::::
::::Guess that you are probably working by the seat of the pants. . . .sans schematic. . . .on that one and the 7F8 being your
:::: local osc mixer on the set . EXTREME probability of no problems with that cluster of parts you have displayed,
::::
::::
::::I initially see the radial ceramic “dogbone “ capacitor being on the top right corner. . .color coding suggesting 5 or 50 pf tied in to that tubes first grid circuitry and its ancillary 47K grid resistor.
::::Yet another casing variant style of a family of ceramic capacitor to its left. Probably a 1.5 pf, that feeds osc output into the first grid of the mixer section of the 7F8and seems like there is yet another of that same type that is waaaay down at the bottom left arrow.
::::
::::
::::The left sides ? mark up seems to be possibly a low value isolation inductor for the #7 filament supply line, with its #2 filament being grounded .
::::
::::
::::Now, is the whole receiver dead or just the FM section ?
::::
::::
::::
::::
::::
::::
::::
::::
::::
::::
::::
::::
::::
::::
::::73's de Edd
::::
::::
::::
::::
::::
That's a good idea. The coil is just a large egg shaped loop of very thick bare wire. One end is connected to the middle FM tuning capacitor.
I do have some RF signal generators. I'll try your suggestion.
Thanks,
Dave
::Hello All,
::One of the tuning slugs is missing. All that's left is the holder that the threads go on to move it in the coil. So this is a ferrite cylinder with a smaller diameter threaded rod attached to one end.
:: Does anyone know where I can find one to use as a replacement?
::
::Thanks,
::
::Dave
:
:
:Dave:
:If you have a signal generator, connect the thing to the antenna and tune it all over the place and see if the missing slug is in the oscillator, and it may be tuning GOKW.
:Lewis
:
:
:
:
:
:
:::Edd,
::: Should I post more pictures?
:::
:::Thanks,
:::
:::Dave
::::Edd,
:::: The FM section is alive, however I can't tune anything. I hear the FM hiss and can touch the coils to the right of this tube, which are connected to the tuning capacitor. It does bring in some FM but it's just a lot of FM stations together. The coil is just a large loop of aluminum. There was a ferrite slug that can be adjusted so that it moves close to one side of the loop. There is another coil like it but the ferrite isn't missing. But I don't think that's the problem. But it sounds like it almost works. If I touch one of the leads of the IF transformer which connects to the 7F8, the his can really get loud. I think it almost works. There's probably some small problem.
:::: AM (BC) works fine and so does the Amplifier of course. The tuning eye closes only of very very strong stations. Weaker ones just move (close) it a little.
:::: I can take more pictures if you need them. I think that our forum might be interested as well. This is a somewhat interesting set.
::::
::::Thanks,
::::
::::Dave
:::::
:::::
:::::
:::::
:::::
:::::
:::::
:::::
:::::
:::::
:::::Sir David:
:::::
:::::Guess that you are probably working by the seat of the pants. . . .sans schematic. . . .on that one and the 7F8 being your
::::: local osc mixer on the set . EXTREME probability of no problems with that cluster of parts you have displayed,
:::::
:::::
:::::I initially see the radial ceramic “dogbone “ capacitor being on the top right corner. . .color coding suggesting 5 or 50 pf tied in to that tubes first grid circuitry and its ancillary 47K grid resistor.
:::::Yet another casing variant style of a family of ceramic capacitor to its left. Probably a 1.5 pf, that feeds osc output into the first grid of the mixer section of the 7F8and seems like there is yet another of that same type that is waaaay down at the bottom left arrow.
:::::
:::::
:::::The left sides ? mark up seems to be possibly a low value isolation inductor for the #7 filament supply line, with its #2 filament being grounded .
:::::
:::::
:::::Now, is the whole receiver dead or just the FM section ?
:::::
:::::
:::::
:::::
:::::
:::::
:::::
:::::
:::::
:::::
:::::
:::::
:::::
:::::
:::::73's de Edd
:::::
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:::::
:::::
:::::
You might try using a ferrite toroid core, they come in many sizes and are inexpensive.