Sonar BR 21

[Birddog2009]

I have a BR 21 that i'm restoring for a buddy and the tubes are flat.. I cannot find any info on the brand used. Does anyone know what brand that the tubes were?

 

[Shockwave]

The BR-21 uses four 6JB6 tubes in the RF amp stage and one 12AT7 as the RF detector for the keying relay.

 

[TonyV225]

I had to find some last year for a Sonar and EBAY had them listed.

 

[w9cll]

I had a BR-21 years ago, it was a good clean amp with about 50-75 watts out. It is rf senseing but I modded mine with a manual key switch which allowed ssb.

 

[Birddog2009]

No im looking for WHAT BRAND was used..

 

[Shockwave]

The brand is not important here. Sonar actually had their own name stamped on the tubes they used. Inspection of the numerical code on the side of Sonar tubes often showed 188-5. That happens to be the code for the old Owensboro Kentucky, General Electric tube plant.

 

[Birddog2009]

Ill see what the code is on the ones in this one.

 

[Mr Fix it]

Cool amp