Finished re-capping, replacing out of tolerance resisters,checking tubes but I can only hear the local clear channel station when at full volume. Voltages look o.k at pins. What do I need to look for next? Many thanks,
Jon.

Have you tried to align it with a signal generator?

:Finished re-capping, replacing out of tolerance resisters,checking tubes but I can only hear the local clear channel station when at full volume. Voltages look o.k at pins. What do I need to look for next? Many thanks,
:Jon.

:Have you tried to align it with a signal generator?
: I did not think to do so because the sound is crystal clear, just at very low volume. Would alignment affect this?
Many thanks,
Jon.
:
:
::Finished re-capping, replacing out of tolerance resisters,checking tubes but I can only hear the local clear channel station when at full volume. Voltages look o.k at pins. What do I need to look for next? Many thanks,
::Jon.

Jon, Can you post the voltages on pins of the 6A7 det-osc tube? The oscillator may not be running. Should reversed biased by several volts. Also do you get more reception by touching the top cap of the 6A7 tube? Good reception may indicate an open antenna coil.

Richard

:Jon, Can you post the voltages on pins of the 6A7 det-osc tube? The oscillator may not be running. Should reversed biased by several volts. Also do you get more reception by touching the top cap of the 6A7 tube? Good reception may indicate an open antenna coil.
:
:Richard
There is no difference when touching the 6A7. I will double check the voltages on it when I get home.
Many thanks for the help.
Jon.

:Jon, Can you post the voltages on pins of the 6A7 det-osc tube? The oscillator may not be running. Should reversed biased by several volts. Also do you get more reception by touching the top cap of the 6A7 tube? Good reception may indicate an open antenna coil.
:
:Richard

Richard,
I think I had problems with my Simpson 260. I re-checked voltages with my back up. This is what I got:
41 pin 2-150v
pin 3 162v
75 pin 2 75v
78 pin 2 160v
pin 3 43v
pin 4 -.02v
6A7 pin 2 162v
pin 3 43v
pin 4 170v
They all look to be low compared with the schematic.
Any suggestions?
Jon.

Jon, Just got home working a 12 hour night, so I'm a little groggy. Some quick suggestions. Probably best to attack the low voltages you are seeing first. The audio tube can pull down everything if it is not reversed bias by approximately -16V on the control grid. If not right, then check resistance of item 33, 34, and the field coil. Can also remove the 41 tube and see if the voltage go much higher than normal which indicates it is pulling down things. That's all I have for now and invite others to jump in. Zzzzzzzzzzzzzz

Richard

:Jon, Just got home working a 12 hour night, so I'm a little groggy. Some quick suggestions. Probably best to attack the low voltages you are seeing first. The audio tube can pull down everything if it is not reversed bias by approximately -16V on the control grid. If not right, then check resistance of item 33, 34, and the field coil. Can also remove the 41 tube and see if the voltage go much higher than normal which indicates it is pulling down things. That's all I have for now and invite others to jump in.

Zzzzzzzzzzzzzz

Richard, A million thanks for the advice, I will check it out when I finish my "12"
Jon.
:
:Richard

::Jon, Just got home working a 12 hour night, so I'm a little groggy. Some quick suggestions. Probably best to attack the low voltages you are seeing first. The audio tube can pull down everything if it is not reversed bias by approximately -16V on the control grid. If not right, then check resistance of item 33, 34, and the field coil. Can also remove the 41 tube and see if the voltage go much higher than normal which indicates it is pulling down things. That's all I have for now and invite others to jump in.
:
:Zzzzzzzzzzzzzz
:
:Richard, A million thanks for the advice, I will check it out when I finish my "12"
:Jon.
::
::Richard

Jon,

If you have replaced C31 with individual caps, be sure to observe polarity. Note the minus of the 12 mfd section goes to the HV centertap and not chassis. Also the plus of the 10 mfd section goes to chassis.

Radiodoc

:::Jon, Just got home working a 12 hour night, so I'm a little groggy. Some quick suggestions. Probably best to attack the low voltages you are seeing first. The audio tube can pull down everything if it is not reversed bias by approximately -16V on the control grid. If not right, then check resistance of item 33, 34, and the field coil. Can also remove the 41 tube and see if the voltage go much higher than normal which indicates it is pulling down things. That's all I have for now and invite others to jump in.
::
::Zzzzzzzzzzzzzz
::
::Richard, A million thanks for the advice, I will check it out when I finish my "12"
::Jon.
:::
:::Richard

:Jon,
:
:If you have replaced C31 with individual caps, be sure to observe polarity. Note the minus of the 12 mfd section goes to the HV centertap and not chassis. Also the plus of the 10 mfd section goes to chassis.
:
:Radiodoc

I will double check. The can cap had been replaced before I got the radio and was pretty well botched up. It took me a while to figure out the schematic as I have not run across one like this with the pos side going to chassis.It is entirely possible that I got one of the leads wrong, but the radio has spent a lot of time powered up without any fireworks.Again many thanks from this semi-newbie.
Jon.
:
::::Jon, Just got home working a 12 hour night, so I'm a little groggy. Some quick suggestions. Probably best to attack the low voltages you are seeing first. The audio tube can pull down everything if it is not reversed bias by approximately -16V on the control grid. If not right, then check resistance of item 33, 34, and the field coil. Can also remove the 41 tube and see if the voltage go much higher than normal which indicates it is pulling down things. That's all I have for now and invite others to jump in.
:::
:::Zzzzzzzzzzzzzz
:::
:::Richard, A million thanks for the advice, I will check it out when I finish my "12"
:::Jon.
::::
::::Richard