tubemonkey35
Well-known member
- Joined
- Dec 27, 2004
- Messages
- 165
Ok, I'm playing with some tube substitutions here (Matched Nos Telefunken 6BA6's in place of 6AU6's). With the 6AU6's in there the unit works fine, however 6BA6's are supposed to offer optimal results.
Reference the schemo here:
http://www.waltzingbear.com/Schematics/Misc/FAA_CA-1589.htm
The 6BA6 was giving off a pumping sound until I replaced the .001uf caps at C3 and C4 with .1uf Hovland Musicaps. Now the pumping is gone but a very rapid sound in now in place of the pumping. I also changed out C1 and C2 for new .001uf caps. What's going on here? Any ideas?
With 6AU6's in there, I noticed a clearer picture using the Hovland Musicaps right off the bat.
Reference the schemo here:
http://www.waltzingbear.com/Schematics/Misc/FAA_CA-1589.htm
The 6BA6 was giving off a pumping sound until I replaced the .001uf caps at C3 and C4 with .1uf Hovland Musicaps. Now the pumping is gone but a very rapid sound in now in place of the pumping. I also changed out C1 and C2 for new .001uf caps. What's going on here? Any ideas?
With 6AU6's in there, I noticed a clearer picture using the Hovland Musicaps right off the bat.