National HRO 500 Communications Receiver Video #2 - Signal Tracing Attempt

I'm getting more familiar with the radio and I try some signal tracing to see what is working and what is not.

[@hamsac1]

The socket in the back of the radio may be an accessory jack when used with a transmitter. When not used with a transmitter you may need a shorting plug to pass power supply voltages back into the radio. If you have an owners manual it may show a shorting plug inserted in the back when using as just a receiver.

[@mnoxman]

Assume a 22 tube radio. 2 tubes using a Push-Pull configuration to get 100W. The remainder being dual triode *sk7, *au7, ax7, sn7, that would be 40 amplifiers or 40 transistors.

[@hackupboulders]

Clean the pots, spray cool parts etc.

[@Mikek2bn]

A good approach on this complicated radio would be to get a manual . I have owned several of these radios and trying to trouble shoot without a manual is very difficuly

[@deanmakin5762]

I don't hear anything coming from the speakers.

[@RonaldHofmeister-n1n]

Who made that Radio? Panasonic?

[@BruceRobertson]

The HRO line was made by National.

[@RonaldHofmeister-n1n]

There is an Expert in the State of Arizona that is fixing my Vintage Sony Shortwave Radio. If you want his address I can give it to you!!

[@Aquapon67]

I like your approach to troubleshooting. Good man and good luck. All things can be fixed...with enough time and pressure! :)