[SBE] RCA Dummy Load

[K7CR]

Dan – Kinda concerned that it’s bone dry.   Perhaps someone dumped the contents in the fear it contained PCB’s?

 

Have you put an ohmmeter on the input to make sure that all is well inside?

 

Regarding the Cannon Connector on the end of it – That was usually connected to an internal temperature switch that was part of an interlock-string.

If you want to use that…I might have a connector, let me know

 

I do know you can put 500 watts into it for some period of time and it only gets slightly warm

 

Clay/K7CR

 

From: SBE [mailto:sbe-bounces at sbe.org] On Behalf Of DanRapak at verizon.net
Sent: Thursday, April 05, 2018 7:46 PM
To: sbe at sbe.org
Subject: Re: [SBE] RCA Dummy Load

 

Thanks Jack. Much appreciated!

On 4/5/2018 10:26 PM, jack.davis wrote:

Darn spell check PCB 

 

 

 

Sent from my Verizon, Samsung Galaxy smartphone by smoke signals 

 

-------- Original message --------

From: "jack.davis"  <mailto:jack.davis at engineer.com> <jack.davis at engineer.com> 

Date: 4/5/18 7:19 PM (GMT-08:00) 

To: sbe member discussion mail list  <mailto:sbe at sbe.org> <sbe at sbe.org> 

Subject: Re: [SBE] RCA Dummy Load 

 

It will be either 50 or 51.5 ohms and should be good to at least channel 13.  The plug should be a normally closed thermal switch that opens on high temperature. 

 

The oil could be something that smells like fly spray. Very obnoxious stuff!  Will dissolve vinyl floor tile (don't ask).  Could be COB.

 

Jack

K6YC 

 

 

 

Sent from my Verizon, Samsung Galaxy smartphone by smoke signals 

 

-------- Original message --------

From: DanRapak at verizon.net 

Date: 4/5/18 6:02 PM (GMT-08:00) 

To: SBE Broadcast Group  <mailto:sbe at sbe.org> <sbe at sbe.org> 

Subject: [SBE] RCA Dummy Load 

 

All:

I'm looking for information on an old dummy load. I have an old RCA liquid cooled dummy load that's been collecting dust for several years. It is an RCA  P/N 216251. It's a nice unit with substantial heat fins. It's rated at 1 KW continuous and 1.5 KW for 30 minutes. I'm about to put it in service in the ham shack. However, I have no manual for it.

My first question is, does anyone know what the frequency range of this unit is?

Second, there is a two-pin, military style Amphenol connector on the the dummy load. What is the purpose of this connection?

Finally, what is the recommended transformer oil / coolant for this thing?

Any help would be appreciated.

Thanks in advance,
Dan Rapak







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