Search found 110 matches
- Fri Jun 19, 2015 1:12 pm
- Forum: Marshall Discussion
- Topic: TSL 60 footswitch issue
- Replies: 1
- Views: 932
Re: TSL 60 footswitch issue
Installed the footswitch backwards. Fixed and working fine now.
- Thu Jun 18, 2015 10:23 pm
- Forum: Marshall Discussion
- Topic: TSL 60 footswitch issue
- Replies: 1
- Views: 932
TSL 60 footswitch issue
Replaced what I thought was just a bad momentary switch but footswitch is still acting funny. Clean only works if you hold the footswitch down. Won't switch out of crunch mode. Lead switch does nothing at all. No diodes or resistors appear to be blown. I think its one of the transistors TR1-TR4. Any...
- Fri Dec 05, 2014 3:34 am
- Forum: Technical Discussion
- Topic: HUSS 6v6 layout
- Replies: 58
- Views: 8776
Re: HUSS 6v6 layout
Structo has the correct layout.
- Thu Dec 04, 2014 12:13 am
- Forum: Speakers and Cabinets
- Topic: Speaker ohms low?
- Replies: 4
- Views: 1561
Re: Speaker ohms low?
Speaker was bad. No coil rub. A 200 watt amp in the Traynor K-4 was driving this speaker. It would crackle every few seconds and only for a split second. Otherwise it sounded fine. Removed the speaker and hooked it up to my 20 watt Marantz stereo and it was farting like crazy. New speaker ordered!
- Mon Dec 01, 2014 6:27 pm
- Forum: Technical Discussion
- Topic: HUSS 6v6 layout
- Replies: 58
- Views: 8776
Re: HUSS 6v6 layout
I built one of those, you guys helped me find the wrong resistor I put in from a pic! Other than that it was a pretty flawless build and sounds amazing.
- Wed Nov 26, 2014 3:08 pm
- Forum: Speakers and Cabinets
- Topic: Speaker ohms low?
- Replies: 4
- Views: 1561
Speaker ohms low?
Working on a Traynor K4 keyboard amp with a crackling 12" subwoofer. It will crackle every few seconds when the volume is 50% or better. I measured the ohms on this speaker which is at 2.4 ohms and should be four. Is this too low?
- Tue Sep 30, 2014 1:00 am
- Forum: Technical Discussion
- Topic: West Grande mod
- Replies: 37
- Views: 4536
Re: West Grande mod
Yep, I put in some 1K's.
- Sat Sep 27, 2014 3:00 pm
- Forum: Technical Discussion
- Topic: West Grande mod
- Replies: 37
- Views: 4536
Re: West Grande mod
I finished the amp and got it biased up at 52ma on the nose. Sounds really good, LOUD, and a nice full bass. Ready to rock. Thanks all, esp. Martin and Leo for getting me in the right direction.
- Thu Sep 25, 2014 9:34 pm
- Forum: Technical Discussion
- Topic: West Grande mod
- Replies: 37
- Views: 4536
Re: West Grande mod
Recieved my KT88'S from CE today, matched within 5ma, but pulling around 76-80ma. What is a comfortable ma to be at 60 or 70%, since these are higher output tube?
- Thu Sep 25, 2014 1:54 am
- Forum: Technical Discussion
- Topic: West Grande mod
- Replies: 37
- Views: 4536
Re: West Grande mod
I dropped them down to 150k's now just in case. My customer will be using this in a punk band, so reliability is one of the biggest concerns.
- Thu Sep 25, 2014 12:27 am
- Forum: Technical Discussion
- Topic: West Grande mod
- Replies: 37
- Views: 4536
Re: West Grande mod
Found two 20v 5w zeners in the shop, can I use those in the center tap or since I got the KT's just not worry about it? Thanks
- Wed Sep 24, 2014 3:42 pm
- Forum: Technical Discussion
- Topic: West Grande mod
- Replies: 37
- Views: 4536
Re: West Grande mod
OT 5020 @ 8ohms, 4160@4ohms, 4690@16ohms is what I came out with. Sounds like this amp would be a good candidate for a zener diode voltage mod, I'm running 565 volts on the plates with screens just about the same. I have some JJ KT88'S coming just hope they fit.
- Mon Sep 22, 2014 7:53 pm
- Forum: Technical Discussion
- Topic: Is Westlabs still in business?
- Replies: 11
- Views: 1315
Re: Is Westlabs still in business?
I've also tried to reach Dave a few weeks ago and haven't heard back. I think he's in his 70's now so I'm sure the business is closed.
- Sun Sep 21, 2014 1:16 am
- Forum: Technical Discussion
- Topic: West Grande mod
- Replies: 37
- Views: 4536
Re: West Grande mod
It does supply power to the screens (Pin 4). I don't remember how to measure the ot but I'll post that as soon as I figure that out.
- Sat Sep 20, 2014 11:29 pm
- Forum: Technical Discussion
- Topic: West Grande mod
- Replies: 37
- Views: 4536
Re: West Grande mod
Now that I think about it, I have to use KT88'S.