On a similar subject, I always change out the 3TF7 and put in a dale chassis mount 50 ohm resistor. Works great. 73 – Mike

Mike B. Feher, N4FS

89 Arnold Blvd.

Howell NJ 07731

908-902-3831

From: [email protected] <[email protected]> On Behalf Of Bill Mellema via MRCA
Sent: Friday, January 23, 2026 9:11 PM
To: Jeep Platt <[email protected]>; Military Radio Collectors Association <[email protected]>
Subject: Re: [MRCA] R390A dropping resistor value

Great….thanks Jeep

Bill N3WM


Sent from Yahoo Mail for iPhone

On Friday, January 23, 2026, 7:30 PM, Jeep Platt <[email protected]> wrote:

Bill, I have the Navy book that shows solid-state rectifiers.  I will look it up in the morning...

Jeep K3HVG

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

---

From: [email protected] <[email protected]> on behalf of Bill Mellema via MRCA <[email protected]>
Sent: Thursday, January 22, 2026 8:23:33 PM
To: Military Radio Collectors Association <[email protected]>
Subject: [MRCA] R390A dropping resistor value

Guys,

I'm in the process of solid stating the power supply on a R390A. I need the value of the series resistor listed in the field change. 

If anyone can help, I would appreciate it.

Best 73's

Bill N3WM

Virus-free.www.avg.com