Herald Amp

srb02 · 17th October 2011, 05:50 PM

Went yard-sale-ing last weekend. Found a Herald RA-10A amplifier.

Really clean, nothing appears or smells burnt.
AM-FM, multi inputs. Takes a total of 10 tubes, none were included. I have checked and all the tubes are still readily available.

I have checked Sams's and Antique Radio, and I can find no information
on this unit.
Any help would be most appreciated. (hate to think I wasted $20)

thanks Stu

Palustris · 18th October 2011, 03:15 PM

This sounds like it could have been something imported from Japan in the 1960s. Usually a small quantity was imported by a big retailer like Olsen and they would put their name on it or some English sounding name like Herald. It probably has good output transformers; you will have to draw out the schematic but I would definitely suspect it is a variation of the Williamson topology.

17th October 2011, 05:50 PM	#1
srb02 diyAudio Member Join Date: Mar 2011	Herald Amp Went yard-sale-ing last weekend. Found a Herald RA-10A amplifier. Really clean, nothing appears or smells burnt. AM-FM, multi inputs. Takes a total of 10 tubes, none were included. I have checked and all the tubes are still readily available. I have checked Sams's and Antique Radio, and I can find no information on this unit. Any help would be most appreciated. (hate to think I wasted $20) thanks Stu

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18th October 2011, 03:15 PM	#2
Palustris diyAudio Member Join Date: Aug 2006 Location: Cape Cod	This sounds like it could have been something imported from Japan in the 1960s. Usually a small quantity was imported by a big retailer like Olsen and they would put their name on it or some English sounding name like Herald. It probably has good output transformers; you will have to draw out the schematic but I would definitely suspect it is a variation of the Williamson topology.

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