Forums :: NEW! Web Resources :: Features :: Photo Gallery :: Vintage Radio Shows :: Archives
Support This Site: Contributors :: Advertise


It is currently Apr Mon 19, 2021 1:02 am


All times are UTC [ DST ]





Post New Topic Post Reply  [ 2 posts ] 
Author Message
 Post subject: Looking For Webster 89D50 PA Amp Schematic
PostPosted: Dec Wed 23, 2020 6:05 pm 
Member

Joined: Aug Sun 23, 2015 6:01 pm
Posts: 1224
Location: NJ 08090
Can't find any schematics on a Webster 89D50 in the shop now. It's a pretty robust unit with 12 tubes...and big trannys.
Tube Line up is.....
2-5U4GB....4-6L6....1-6SJ7...1-6SN7...1-6SL7...3-5879...1-SS455 Relay
Just checking if anyone has schematic info on this to share...


Top
 Profile  
 
 Post subject: Re: Looking For Webster 89D50 PA Amp Schematic
PostPosted: Dec Wed 23, 2020 6:17 pm 
Member
User avatar

Joined: Oct Wed 14, 2009 6:36 am
Posts: 6343
Location: New York USA
Nice unit! The 5879 are special low-noise preamp tubes. Hooked up to efficient Yamaha Club Series IV or similar PA speakers, this should be loud enough to peel the paint off the walls. Considering the surge voltages with fast warm-up 5U4, you may want to use 630 volt Solen Fast Poly capacitors instead of electrolytics, I did that for my Bogen PA amp.


Top
 Profile  
 
Post New Topic Post Reply  [ 2 posts ] 

All times are UTC [ DST ]


Who is online

Users browsing this forum: No registered users and 18 guests



Search for:
Jump to:  


































Privacy Policy :: Powered by phpBB