Did tone bypass on PAS what about caps - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

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

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
Reply
 
Thread Tools Search this Thread
Old 7th April 2010, 11:04 PM   #1
lduncan is offline lduncan  United States
diyAudio Member
 
Join Date: Apr 2010
Default Did tone bypass on PAS what about caps

I was thinking of just replacing all the caps in case I ever wanted to return it to stock. But if I only replace the caps being used do I just do the ones on the phono board or are there others I should replace.

Thanks
  Reply With Quote
Old 8th April 2010, 02:17 PM   #2
Pyre is offline Pyre  Canada
diyAudio Member
 
Pyre's Avatar
 
Join Date: May 2006
Send a message via MSN to Pyre
Have you got a copy of the schematic?

I have found the best plan of action if you ever want to return it to stock is buy 2 new boards for 20 bucks of ebay and install all new components. Ignore the LS section and the FS section parts. Bypass the tone section and ignore all the components from that section as well. A lot of very useful pdf's can be found here:

Dynaco-Doctor.Com - Dynaco Parts, Repairs, Restorations, Premium Modification
  Reply With Quote
Old 8th April 2010, 07:33 PM   #3
diyAudio Member
 
indianajo's Avatar
 
Join Date: Jan 2010
Location: Jeffersonville, Indiana USA
Default caps in PAS preamp

Of course you replace the electrolytic capacitors in a PAS every 20 years. However, my 1961 PAS2 has gotten uneven in gain between the channels, and the resistors test okay, so I am going to replace the paper caps. I've got some film .02 and .05 uf 400 VDC caps from newark, 10 % tolerance, and not being a Pay-pal addict nor a fan of auctions, I'll be repairing my original boards. I'm going to leave the mica caps alone, or whatever those 750 pf ones are, presuming that to be less sensitive to moisture-air than paper dielectric.
__________________
Dynakit ST70, ST120, PAS2,Hammond H182(2 ea),H112,A100,10-82TC,Peavey CS800S,1.3K, SP2-XT's, T-300 HF Proj's, Steinway console, Herald RA88a mixer, Wurlitzer 4500, 4300

Last edited by indianajo; 8th April 2010 at 07:35 PM. Reason: typos
  Reply With Quote

Reply


Hide 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
bypass caps for bypassing mylar caps? crippledchicken Multi-Way 4 27th February 2008 05:24 AM
Dynaco PAS Preamp Tone Controls Justin_122 Tubes / Valves 0 7th October 2007 05:32 AM
bypass tone controls on heathkit sp-2 Rispoli Tubes / Valves 5 17th May 2006 02:01 AM
Bypass caps on crossover caps... :D quickshift Multi-Way 19 27th November 2005 01:59 PM
Tone ctrl bypass reduces volume? DragonMaster Solid State 17 9th September 2005 03:10 AM


New To Site? Need Help?

All times are GMT. The time now is 12:21 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.
Copyright 1999-2015 diyAudio

Content Relevant URLs by vBSEO 3.3.2