[R-390] No receive below 8 Mc

[Perry Sandeen]

List,
There are two tools that make servicing the R3XX receivers much easier.
First is a DVM.  There good ones available that are in the $50 ranged. (If you're really, really, really cheap then Harbor Freight has some usually on sale for $4 or less.)
If one want to do more serious work and O'scope is the only way to go.
I got a Tek 2445 for $180 at a hamfest several years ago.There are loads of them on Ebay that are <100 MHz bandwidth.  Some have a DVM value that is on the screen.
For a bit more ($150 to $200)  one can get older 465's with a much higher band width.
IMNSHO, if you can afford R3XX receivers, an O'scope is necessity.
Regards,
Perrier