Home  Resources  References  Tubes  Forums  Links  Support 
pilot tube tuner
9/8/2014 10:33:04 AMpaul
yea its me again. have a pilot tube tuner. model AF-821A
replaced the three plastic .1 400 volt caps. wondering about the .04 600 volt plastic cap. where do I find one?? also running the tuner through my amp on detector it performs excellent.
run it trough the other jack and bass seems to be volume. yes running through two amps. one with bass tone volume, the other is a straight amp. no controls.
9/8/2014 11:04:27 AMCV
Check justradios.com for any cap that you might need. There are several online purveyors of tube radio parts, justradios is the one that I've had good luck with (no lost orders, very fast mail delivery even though they are a Canadian-based company).

You may have a shorted cap in the bass control circuit of your Pilot tuner. That would decrease the volume as the pot cuts in the cap. Do the other controls (volume, treble) work correctly?

9/8/2014 1:41:42 PMpaul
:Check justradios.com for any cap that you might need. There are several online purveyors of tube radio parts, justradios is the one that I've had good luck with (no lost orders, very fast mail delivery even though they are a Canadian-based company).
:
:You may have a shorted cap in the bass control circuit of your Pilot tuner. That would decrease the volume as the pot cuts in the cap. Do the other controls (volume, treble) work correctly?


thank you CV. on inspection found that the volume control has three pots in one. the first pot near the mounting nut has been rewired to the bass control. the bass control has been rewired to the treble control and so on so on.
do not have a schematic for this and probly would need a doner set to fix this. it seems to work fine as long as I remember that bass is volume. thank you

9/8/2014 3:17:32 PMCarl T
:thank you CV. on inspection found that the volume control has three pots in one. the first pot near the mounting nut has been rewired to the bass control. the bass control has been rewired to the treble control and so on so on.
:do not have a schematic for this and probly would need a doner set to fix this. it seems to work fine as long as I remember that bass is volume. thank you

Some one might have Sam's 194-10 for your set.
Carl T

9/8/2014 6:32:26 PMpaul
::thank you CV. on inspection found that the volume control has three pots in one. the first pot near the mounting nut has been rewired to the bass control. the bass control has been rewired to the treble control and so on so on.
::do not have a schematic for this and probly would need a doner set to fix this. it seems to work fine as long as I remember that bass is volume. thank you
:
:Some one might have Sam's 194-10 for your set.
:Carl T

hi Carl T called stevenjohson to see if he had one I could down load. he has it. looked all over for it no dice. have to call him tomorrow. maybe something im missing. thank you

9/9/2014 4:41:51 PMEdd






Sir Paul. . . . . ( McCartney ?)






Submitted herewith one nicely framed and reconstituted/regurgitated schema as needed . . .retrieved from archival storage . . .aka . . . "the mule barn" . . .and wrested from the voracious mouths of silverfish.


All magged on up a bit for clarity, due to the dismal condition of the original . . . . . . . now, I'm that a Mr Magoo type of reader would particularly LOVE that aspect.


It's all matched and mated together as a now UNITIZED schematic . . . .as the manufacturers info was being a split up, two pager.


I additionally . . . . pulled out my "crayolers" and done-did some mark up on all the pots.


The RED-Yaller is the Bass control which alters the response via the sliding transition between an .0047 to an .047 coupling capacitor inter coupling factor.


The Green-Yaller is the treble control which has a constant late stage passing off of high frequency audio via the .03-500k network to ground, with a variance of passing off early stage high response via the early stage .01 ufd capacitor to ground.


The Blue-Yaller is your conventional volume control.


The Fuchsia -Yaller is an attenuator adjustment . . . . . . should your phono cartridge have a higher than required input to the system preamp.


Its adjustment can permit reducing high cartridge input on down to the level that will equally mate up with the normal tuner detector audio output level.

Thasssit . . . . .









73's de Edd







My wife hates when I make jokes about her weight. . . . . . . . she just needs to lighten up.










Pilot AF-821A Tuner Schema










:::thank you CV. on inspection found that the volume control has three pots in one. the first pot near the mounting nut has been rewired to the bass control. the bass control has been rewired to the treble control and so on so on.
:::do not have a schematic for this and probly would need a doner set to fix this. it seems to work fine as long as I remember that bass is volume. thank you
::
::Some one might have Sam's 194-10 for your set.
::Carl T
:
:hi Carl T called stevenjohson to see if he had one I could down load. he has it. looked all over for it no dice. have to call him tomorrow. maybe something im missing. thank you

9/9/2014 4:53:10 PMI'm (sure) that a Mr Magoo
:
:
:
:

:
:
:
:
:
:
:
:
:
:Sir Paul. . . . . ( McCartney ?)
:
:
:
:
:
:
:Submitted herewith one nicely framed and reconstituted/regurgitated schema as needed . . .retrieved from archival storage . . .aka . . . "the mule barn" . . .and wrested from the voracious mouths of silverfish.
:
:
:All magged on up a bit for clarity, due to the dismal condition of the original . . . . . . . now, I'm that a Mr Magoo type of reader would particularly LOVE that aspect.
:
:
:It's all matched and mated together as a now UNITIZED schematic . . . .as the manufacturers info was being a split up, two pager.
:
:
:I additionally . . . . pulled out my "crayolers" and done-did some mark up on all the pots.
:
:
:The RED-Yaller is the Bass control which alters the response via the sliding transition between an .0047 to an .047 coupling capacitor inter coupling factor.
:
:
:The Green-Yaller is the treble control which has a constant late stage passing off of high frequency audio via the .03-500k network to ground, with a variance of passing off early stage high response via the early stage .01 ufd capacitor to ground.
:
:
:The Blue-Yaller is your conventional volume control.
:
:
:The Fuchsia -Yaller is an attenuator adjustment . . . . . . should your phono cartridge have a higher than required input to the system preamp.
:
:
:Its adjustment can permit reducing high cartridge input on down to the level that will equally mate up with the normal tuner detector audio output level.
:
:
:
:Thasssit . . . . .
:
:
:
:
:
:
:
:
:
:
:
:
:
:73's de Edd

:
:
:


:
:
:
:
:
:
:
:
:
: My wife hates when I make jokes about her weight. . . . . . . . she just needs to lighten up.
:
:
:
:

:
:
:
:
:

:
:
:
: Pilot AF-821A Tuner Schema
:
:
:
:
:
:
:
:
:
:

:
:
:
:
:
:
::::thank you CV. on inspection found that the volume control has three pots in one. the first pot near the mounting nut has been rewired to the bass control. the bass control has been rewired to the treble control and so on so on.
::::do not have a schematic for this and probly would need a doner set to fix this. it seems to work fine as long as I remember that bass is volume. thank you
:::
:::Some one might have Sam's 194-10 for your set.
:::Carl T
::
::hi Carl T called stevenjohson to see if he had one I could down load. he has it. looked all over for it no dice. have to call him tomorrow. maybe something im missing. thank you
9/9/2014 8:05:32 PMpaul
::
::
::
::

::
::
::
::
::
::
::
::
::
::Sir Paul. . . . . ( McCartney ?)
::
::
::
::
::
::
::Submitted herewith one nicely framed and reconstituted/regurgitated schema as needed . . .retrieved from archival storage . . .aka . . . "the mule barn" . . .and wrested from the voracious mouths of silverfish.
::
::
::All magged on up a bit for clarity, due to the dismal condition of the original . . . . . . . now, I'm that a Mr Magoo type of reader would particularly LOVE that aspect.
::
::
::It's all matched and mated together as a now UNITIZED schematic . . . .as the manufacturers info was being a split up, two pager.
::
::
::I additionally . . . . pulled out my "crayolers" and done-did some mark up on all the pots.
::
::
::The RED-Yaller is the Bass control which alters the response via the sliding transition between an .0047 to an .047 coupling capacitor inter coupling factor.
::
::
::The Green-Yaller is the treble control which has a constant late stage passing off of high frequency audio via the .03-500k network to ground, with a variance of passing off early stage high response via the early stage .01 ufd capacitor to ground.
::
::
::The Blue-Yaller is your conventional volume control.
::
::
::The Fuchsia -Yaller is an attenuator adjustment . . . . . . should your phono cartridge have a higher than required input to the system preamp.
::
::
::Its adjustment can permit reducing high cartridge input on down to the level that will equally mate up with the normal tuner detector audio output level.
::
::
::
::Thasssit . . . . .
::
::
::
::
::
::
::
::
::
::
::
::
::
::73's de Edd

::
::
::


::
::
::
::
::
::
::
::
::
:: My wife hates when I make jokes about her weight. . . . . . . . she just needs to lighten up.
::
::
::
::

::
::
::
::
::

::
::
::
:: Pilot AF-821A Tuner Schema
::
::
::
::
::
::
::
::
::
::

::
::
::
::
::
::
:::::thank you CV. on inspection found that the volume control has three pots in one. the first pot near the mounting nut has been rewired to the bass control. the bass control has been rewired to the treble control and so on so on.
:::::do not have a schematic for this and probly would need a doner set to fix this. it seems to work fine as long as I remember that bass is volume. thank you
::::
::::Some one might have Sam's 194-10 for your set.
::::Carl T
:::
:::hi Carl T called stevenjohson to see if he had one I could down load. he has it. looked all over for it no dice. have to call him tomorrow. maybe something im missing. thank you

wow thank you Edd. that helps me a lot. some one took great pain to change this tuner to some one else spec. there is a lot of things missing. just plain gone. yet it works great. im going to leave it like it is. thank very much. paul w

9/11/2014 6:59:37 PMpaul
:::
:::
:::
:::

:::
:::
:::
:::


hi again. looking over this tuner came up with a few things that were changed or missing. stating with the tone control, was single pot now dual pot. volume control three pots in one. all check at 10k. should be single pot 500k. pot for phono cart. on back missing. slide switch for amp in and out missing. resistor been changed to higher values. tv in phono in disconnected.
:::this thing is a mess. thank you
:::
:::
:::
:::
:::Sir Paul. . . . . ( McCartney ?)
:::
:::
:::
:::
:::
:::
:::Submitted herewith one nicely framed and reconstituted/regurgitated schema as needed . . .retrieved from archival storage . . .aka . . . "the mule barn" . . .and wrested from the voracious mouths of silverfish.
:::
:::
:::All magged on up a bit for clarity, due to the dismal condition of the original . . . . . . . now, I'm that a Mr Magoo type of reader would particularly LOVE that aspect.
:::
:::
:::It's all matched and mated together as a now UNITIZED schematic . . . .as the manufacturers info was being a split up, two pager.
:::
:::
:::I additionally . . . . pulled out my "crayolers" and done-did some mark up on all the pots.
:::
:::
:::The RED-Yaller is the Bass control which alters the response via the sliding transition between an .0047 to an .047 coupling capacitor inter coupling factor.
:::
:::
:::The Green-Yaller is the treble control which has a constant late stage passing off of high frequency audio via the .03-500k network to ground, with a variance of passing off early stage high response via the early stage .01 ufd capacitor to ground.
:::
:::
:::The Blue-Yaller is your conventional volume control.
:::
:::
:::The Fuchsia -Yaller is an attenuator adjustment . . . . . . should your phono cartridge have a higher than required input to the system preamp.
:::
:::
:::Its adjustment can permit reducing high cartridge input on down to the level that will equally mate up with the normal tuner detector audio output level.
:::
:::
:::
:::Thasssit . . . . .
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::73's de Edd

:::
:::
:::


:::
:::
:::
:::
:::
:::
:::
:::
:::
::: My wife hates when I make jokes about her weight. . . . . . . . she just needs to lighten up.
:::
:::
:::
:::

:::
:::
:::
:::
:::

:::
:::
:::
::: Pilot AF-821A Tuner Schema
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::

:::
:::
:::
:::
:::
:::
::::::thank you CV. on inspection found that the volume control has three pots in one. the first pot near the mounting nut has been rewired to the bass control. the bass control has been rewired to the treble control and so on so on.
::::::do not have a schematic for this and probly would need a doner set to fix this. it seems to work fine as long as I remember that bass is volume. thank you
:::::
:::::Some one might have Sam's 194-10 for your set.
:::::Carl T
::::
::::hi Carl T called stevenjohson to see if he had one I could down load. he has it. looked all over for it no dice. have to call him tomorrow. maybe something im missing. thank you
:
:
:
:wow thank you Edd. that helps me a lot. some one took great pain to change this tuner to some one else spec. there is a lot of things missing. just plain gone. yet it works great. im going to leave it like it is. thank very much. paul w


© 1989-2025, Nostalgia Air