D&A PDX 400

[DandyRandy]

Hello everyone....new member here so be gentle. Does anyone have a schematics for the D&A PDX 400 ? I'm trying to replace the components in the keying circuit.... amplifier stopped keying up...... I've already replaced the transistor but there are 2 glass diodes that have no markings on them that I can't figure out what they are ( zener? geranium?or switching) one of them tested shorted.
Replacing the transistor didn't fix the problem. If anyone has a copy of the schematics I'll be glad to pay for it.
Thanks
Randy

 

[kopcicle]

https://www.worldwidedx.com/threads/d-a-pdx-400.23121/#post-57648
@nomadradio
If you ask nicely Nomad may have that scribble

 

[DandyRandy]

Hello everyone....new member here so be gentle. Does anyone have a schematics for the D&A PDX 400 ? I'm trying to replace the components in the keying circuit.... amplifier stopped keying up...... I've already replaced the transistor but there are 2 glass diodes that have no markings on them that I can't figure out what they are ( zener? geranium?or switching) one of them tested shorted.
Replacing the transistor didn't fix the problem. If anyone has a copy of the schematics I'll be glad to pay for it.
Thanks
RandyView attachment 34337

 

[Tokin]

Hello everyone....new member here so be gentle. Does anyone have a schematics for the D&A PDX 400 ? I'm trying to replace the components in the keying circuit.... amplifier stopped keying up...... I've already replaced the transistor but there are 2 glass diodes that have no markings on them that I can't figure out what they are ( zener? geranium?or switching) one of them tested shorted.
Replacing the transistor didn't fix the problem. If anyone has a copy of the schematics I'll be glad to pay for it.
Thanks
RandyView attachment 34337

If youre talking about the 2 diodes banded orange yellow brown I believe they are 1n34a diodes if im seeing the colors right.