The mod, in general, appeared in 73 magazine in the 1960's. It is/was an unnecessary hack job, I believe. The ARR-15( ) can be used even with its very broad IF. An outboard Q-5er works quite well. There is an internal cw audio filter of some slight usefulness. The mod brought imbedded mode functions to the front panel. The only mod one would need to possibly do is attach fil and B+ to the dynamotor pins via a rear panel plug as the organic mating connector is unobtainium. The dual PTO design is interesting. My ART-13/dual ARR-15 (ARC-25) setup now in ops at W1NZR.

Jeep K3HVG

Sent from my Verizon, Samsung Galaxy smartphone
Get Outlook for Android

From: [email protected] <[email protected]> on behalf of W2HX <[email protected]>
Sent: Friday, June 7, 2024 1:46:22 PM
To: [email protected] <[email protected]>; k2ajr--- via MRCA <[email protected]>
Subject: [MRCA] R-105/ARR-15 mod?

Hi all, I was browsing ebay and came across this ARR-15 and noticed someone ham-mered the front panel with a column of switches down the left side.

https://www.ebay.com/itm/166778324274

then I saw another one just like it, but better done!

https://www.ebay.com/itm/115721014547

I got to wondering, was this a common mod? Anyone know what it is for (maybe switching attenuation in/out?) or was this an official mod or something?

Thanks

73 Eugene W2HX
My Youtube Channel: https://www.youtube.com/@w2hx/videos