Got a R1155 that I am going thru for someone. It’s all original on the outside although someone played around with the innards a bit. The owner wants it to appear all original on the outside and be functional as a receiver on the inside.

I have played around with a couple 1155 before so know about all the leaky capacitors that will have to be replaced but had a couple questions.

First, I cut down an old Jones plug to fit the connector on the front (P1) but noticed that there are two antenna inputs, pin 1 for HF and pin 2 for the trailing wire antenna, the LF band. Any reason why I cannot just connect pin 1 & 2 together and bring that out on some coax?  Can pick up the ground on pin 4 and figure if it’s a short coax jumper can put a BNC or something on it and the owner can use that to hook up his antennas. Wonder if anyone has gone as far as to mount a coax connector on the plug shell?

ALL of this goes on the plug and not the radio!

Second, have to build up an external power supply and was thinking of running a reduced B+ of around maybe 175 volts or so. Don’t see where this will be any issue unless there is some magic voltage that has to be used for the eye tube.

May also build a one tube audio amplifier like a 6AQ5 or 6V6 into the power supply being the audio from the receiver would be somewhat week and imagine the owner will want to drive an external speaker.

What would be an appropriate box to use for housing the external power supply and speaker?

One option may be like a old speaker cabinet that can also accommodate the power supply and amplifier.

Third, this is the tough one- being it still has all the ADF stuff installed, although someone removed the three tubes and the coils are beat up its not that hard to come up with the external cross needle indicator and would there be any value in connecting that up? Do not have the loop antenna and don’t think I will see one anytime soon but think at least without the antenna you can play with all the balance and assorted knobs on the radio being they are all still there.

If it were my own receiver would take all the ADF stuff out but the owner wants this to look all original and I have already told them that I can get it working for them but a lot of the stuff on the radio will not do anything without the loop antenna and external display.

Ray F/KA3EKH