Hello All,
This is about the Fisher I mentioned in another posting. One of the channels isn't capable of the same high frequencies as the other. What do you recommend I look at? I wont rule out that I may have made a mistake with a capacitor value either. But I think it may be a disc capacitor problem.

Thanks,

Dave

525-7 is the Sams number. This is an X100 there is no A, B or C on it. It's the original X100. I'm not sure if that SAMs has the original X100 in it.

Dave

Probably a different cap value? High frequency response is reduced by caps from the signal line to B+ or ground. Sometimes there is a cap across the output transformer. Be sure one isn't too large. It's easy to be a decade off in cap values. One marked 103 is .01 mf, 104 is .1 mf.

Norm

:Hello All,
: This is about the Fisher I mentioned in another posting. One of the channels isn't capable of the same high frequencies as the other. What do you recommend I look at? I wont rule out that I may have made a mistake with a capacitor value either. But I think it may be a disc capacitor problem.
:
:Thanks,
:
:Dave
:
:525-7 is the Sams number. This is an X100 there is no A, B or C on it. It's the original X100. I'm not sure if that SAMs has the original X100 in it.
:

Try swapping the speakers...maybe your tweeter has lost its' cherp.

MRO

:Dave
:
: Probably a different cap value? High frequency response is reduced by caps from the signal line to B+ or ground. Sometimes there is a cap across the output transformer. Be sure one isn't too large. It's easy to be a decade off in cap values. One marked 103 is .01 mf, 104 is .1 mf.
:
:Norm
:
::Hello All,
:: This is about the Fisher I mentioned in another posting. One of the channels isn't capable of the same high frequencies as the other. What do you recommend I look at? I wont rule out that I may have made a mistake with a capacitor value either. But I think it may be a disc capacitor problem.
::
::Thanks,
::
::Dave
::
::525-7 is the Sams number. This is an X100 there is no A, B or C on it. It's the original X100. I'm not sure if that SAMs has the original X100 in it.
::

Mark.
I tried that but I had the same result.

Thanks,

Dave
:Try swapping the speakers...maybe your tweeter has lost its' cherp.
:
:MRO
:
::Dave
::
:: Probably a different cap value? High frequency response is reduced by caps from the signal line to B+ or ground. Sometimes there is a cap across the output transformer. Be sure one isn't too large. It's easy to be a decade off in cap values. One marked 103 is .01 mf, 104 is .1 mf.
::
::Norm
::
:::Hello All,
::: This is about the Fisher I mentioned in another posting. One of the channels isn't capable of the same high frequencies as the other. What do you recommend I look at? I wont rule out that I may have made a mistake with a capacitor value either. But I think it may be a disc capacitor problem.
:::
:::Thanks,
:::
:::Dave
:::
:::525-7 is the Sams number. This is an X100 there is no A, B or C on it. It's the original X100. I'm not sure if that SAMs has the original X100 in it.
:::

Norm,
Yes, I thought of that. When I get it back I'll check.

Thanks,

Dave
:Dave
:
: Probably a different cap value? High frequency response is reduced by caps from the signal line to B+ or ground. Sometimes there is a cap across the output transformer. Be sure one isn't too large. It's easy to be a decade off in cap values. One marked 103 is .01 mf, 104 is .1 mf.
:
:Norm
:
::Hello All,
:: This is about the Fisher I mentioned in another posting. One of the channels isn't capable of the same high frequencies as the other. What do you recommend I look at? I wont rule out that I may have made a mistake with a capacitor value either. But I think it may be a disc capacitor problem.
::
::Thanks,
::
::Dave
::
::525-7 is the Sams number. This is an X100 there is no A, B or C on it. It's the original X100. I'm not sure if that SAMs has the original X100 in it.
::

:Norm,
: Yes, I thought of that. When I get it back I'll check.
:
:Thanks,
:
:Dave
::Dave
::
:: Probably a different cap value? High frequency response is reduced by caps from the signal line to B+ or ground. Sometimes there is a cap across the output transformer. Be sure one isn't too large. It's easy to be a decade off in cap values. One marked 103 is .01 mf, 104 is .1 mf.
::
::Norm
::
:::Hello All,
::: This is about the Fisher I mentioned in another posting. One of the channels isn't capable of the same high frequencies as the other. What do you recommend I look at? I wont rule out that I may have made a mistake with a capacitor value either. But I think it may be a disc capacitor problem.
:::
:::Thanks,
:::
:::Dave
:::
:::525-7 is the Sams number. This is an X100 there is no A, B or C on it. It's the original X100. I'm not sure if that SAMs has the original X100 in it.
:::
Check the unit to see WHERE the tone difference seems to be onsetting by using different inputting sources e.g. tape, tuner. and mag phono.
And I am supposing it probably will be near the end of the amp chain. If you will check the units supplied schema you can also check for any possible
errors in values of bypasssing or coupling capacitors. The final thought, as well as a definitive test would to be go to my marked A and A' referencing points
and lift the particular marked ends of those caps .

Then you take cap A and connect its floating end to two clip leads ..leaving two floating clip lead ends....the first lead will be placed in the very close proximity
of the resistor junction that you lifted that cap from..perhaps clipping it onto the bakelite of the resistor proper. The other lead will be routed down to the other
channel of the amp to the like position of the resistive junction where you lifted A' capacitor from.

Now what you would be able to do is have a music source playing with its A channel audio coming up to the point where you had branched its output to the
two clip leads and then you would be able to alternatively touch the incoming audio source to power amp channel A or power amp channel B, and thus be able to see
if the output stages created a different tonal quality from the identical source of signal.
This can be done in a FLASH with the alternative touching of the clip
leads, so there should be ambiguity for error. If your tonal difference is experienced on this test area, start looking for your trouble being from point A on deeper
into the power amp stage circuitry . If no difference is experienced, reinstall the free floating caps leads and move further to the front of the amp to point B and B'
as well as C and C'and enact the same evaluative procedure. That should evaluate the two frontal AF amp stages as well as the phono stage, but I think that you
would have differentiated those by the initially mentioned separate tuner/ phono tests .


The BIG picture is.......[HERE]

73's de Edd