UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

Mike Phelan · 18th Apr 2006, 7:57 am

What did you use for the spring line, and the transducers, Jim?

Hammond ones had moving-magnet transducers; the input was driven from a wirewound pot across the speaker, and the low impedance output went to a PNP germanium transistor, thence to the all-valve reverb amp.

There have been various designs in the comics using piezo cartridges.

18th Apr 2006, 7:57 am	#2
Mike Phelan Dekatron Join Date: Nov 2003 Location: Near Leeds, West Yorkshire, UK Posts: 4,609	Re: Homebrew Reverb Unit What did you use for the spring line, and the transducers, Jim? Hammond ones had moving-magnet transducers; the input was driven from a wirewound pot across the speaker, and the low impedance output went to a PNP germanium transistor, thence to the all-valve reverb amp. There have been various designs in the comics using piezo cartridges. __________________ Mike.