Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

Herald Amp
Herald Amp
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 17th October 2011, 05:50 PM   #1
srb02 is offline srb02  United States
diyAudio Member
Join Date: Mar 2011
Location: Taunton, Ma
Default 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
  Reply With Quote
Old 18th October 2011, 03:15 PM   #2
Palustris is offline Palustris  United States
diyAudio Member
Palustris's Avatar
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.
  Reply With Quote


Herald AmpHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
FS- Twisted Pear Buffalo 32S Board & System New & Unused secretriches Swap Meet 1 10th August 2009 02:17 PM
Modify & build out (2) Western Electric 300B / 2A3 Hammond monoblock amps & UTC LS-5 quality sound Tubes / Valves 0 9th May 2009 03:59 PM
Krell KSA 80 bias & dc offset check & adjust procedure Clouseaupte Solid State 3 9th August 2007 09:39 AM
DIY-AMP <ZAS> Low THD & IM high bandwith murphy Solid State 18 30th December 2005 10:28 AM

New To Site? Need Help?

All times are GMT. The time now is 06:44 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio