[Amps] Vacuum relays in Dentron MLA-2500

[W8AV at aol.com]

In a message dated 12/26/2003 11:53:08 AM Eastern Standard Time, n4dek at triad.rr.com writes:

> Wondering if maybe someone that has access to the schematic for the MLA-2500 could take a look at it and let me know what I would need to change this amp to use vacuum relays. I've been told that I would need two relays but really don't know for sure. I've found several vacuum relays on ebay but need to be sure of what I need to get. One or two? Voltage? ect.   I can't deal with the relay noise in this amp any longer. 
> Please help!

You need two if you are using SPDT vacuum relays, one to switch the incoming RF from the transceiver to the input of the tubes and one to switch the output from the amp to the antenna.  The MLA-2500 uses an open frame DPDT relay to accomplish both of these functions.

73........de Goose, W8AV