To add to this, Don Leslie’s organ loudspeakers with a pair of 6550s and a 5U4G were updated too 8 silicon diodes and a dropping resistor to prevent popping of the diodes from the near dead short of the filter capacitors upon initial power up.
The previous line of Leslie amplifiers utilized either 4 6V6s and 2 5Y3s or 4 6L6s and 2 5U4Gs.
The additional older design was using a 5V3, 2 6550s and 2 6973s.
Granted these were instrument amplifiers and not hi-fi quality but they operated for decades trouble free.
Don Resor
Sent from someone's iPhone
On Jun 11, 2024, at 12:08 PM, David Breneman via Jukebox-list jukebox-list@lists.netlojix.com wrote:
I also saw solid state replacements but then read that the voltage drop is much less, so amp > mods would be needed, and the warm up of tubes would mean the output DC would be initially > high, and not suitable for some amps.
What would be the reason for using a kludgey solid state replacement? Almost every electronicdevice with tubes uses a 5U4 rectifier. They will continue to be available maybe forever. _______________________________________________ Jukebox-list mailing list -- jukebox-list@lists.netlojix.com To unsubscribe send an email to jukebox-list-leave@lists.netlojix.com %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s Searchable Archives: http://jukebox.markmail.org/