Search found 105 matches

by Henz
Thu Nov 14, 2019 6:33 pm
Forum: Vintage Amps (Before 1991)
Topic: Tone stack caps in C+
Replies: 2
Views: 71

Re: Tone stack caps in C+

Hello JR32, how are you? Thanks for the reply. I would have sent you an email but I thought that you may have been busy with your studies. Yes, I purchased ceramic discs too. It is relatively easy but that 10meg resistor may be in the way plus the potentiometer side of the drops is really tight. Abo...
by Henz
Wed Nov 13, 2019 12:51 am
Forum: Vintage Amps (Before 1991)
Topic: Tone stack caps in C+
Replies: 2
Views: 71

Tone stack caps in C+

Greetings. I have a1984 DRG C+ and have been tweaking the tone stack caps. Haven't replaced any yet although i have two micas for the treble and treble shift and the other 715P's drops . Question: when inside, i removed the old silicone that bound the two 250pf and 750pf's and straightened them upri...
by Henz
Wed Oct 30, 2019 10:00 am
Forum: Rack Pieces
Topic: Bias mod on a 50/50 : how to do
Replies: 29
Views: 15332

Re: Bias mod on a 50/50 : how to do

Sounds to me , first guess, it's the bias resistor for that socket. Do you feel confident enough to open her up and check?
by Henz
Sat Jun 29, 2019 11:20 pm
Forum: Rack Pieces
Topic: 2:90 preamp loud hum
Replies: 4
Views: 658

Re: 2:90 preamp loud hum

Thats ok. man ,I cud use much more info on your setup to try to help. Are you plugging guitar directly in the input of 2:90 on the back and using Instrument switch.... etc... A hum cud be 1001 things. try to tell me your signal path. Blessings. Jim
by Henz
Wed Jun 26, 2019 11:15 pm
Forum: Rack Pieces
Topic: 2:90 preamp loud hum
Replies: 4
Views: 658

Re: 2:90 preamp loud hum

Hello, Forgive me but are you refering to the 2:90 Power Amp?
by Henz
Mon May 13, 2019 11:32 pm
Forum: Vintage Amps (Before 1991)
Topic: MKIIC+ ++ mod
Replies: 3
Views: 953

Re: MKIIC+ ++ mod

Nice to hear from you. I hope all is well. No, I used a standard mono speaker jack to make it foot switchable. Thanx for the info. I wouldn't know how to install the LDR. I replaced them in my 2:90 but that was for the half drive mode. Which didnt help with the pops. Anyway, i'm not sure what to do ...
by Henz
Mon May 06, 2019 10:47 am
Forum: Vintage Amps (Before 1991)
Topic: Solo Head 50 low output
Replies: 6
Views: 1089

Re: Solo Head 50 low output

Disclaimer: Please, going inside an amp can have bad consequences. I've learned the hard way. If uncertain, refer to a qualified tech. Have / can you check all resistors and caps , mainly the Orange drops and see if they measure correctly. When was it last recapped? Take your time and gently wiggle ...
by Henz
Wed May 01, 2019 11:39 am
Forum: Rack Pieces
Topic: 2:ninety humming
Replies: 2
Views: 1772

Re: 2:ninety humming

I doubt that the 10,000uf caps in the matrix are doing that . Are they leaking on the pcb? How are the presence controls acting? If there are no red plating tubes, I might suspect caps. The .1 coupling caps or the .047 cap at the input stage. And of course, visually check for bad connections, solder...
by Henz
Mon Apr 29, 2019 11:13 pm
Forum: Vintage Amps (Before 1991)
Topic: MKIIC+ ++ mod
Replies: 3
Views: 953

MKIIC+ ++ mod

Howdy, Anyone know what one can do to eliminate the pops that come along w/ these great mods (The ole "Fire Breathing Dragon". All credit goes to Boogiebabies , as I was told and to JB32 for a great schematic of the C+.) using a poor man's switch? Thanx!
by Henz
Thu Apr 25, 2019 12:27 pm
Forum: Vintage Amps (Before 1991)
Topic: White noise.
Replies: 5
Views: 964

Re: White noise.

No. No cracking or pops. When I recapped, I recall measuring them . They read fine . I would have to lift board and remove them from circuit to re check. There's much more to the story. I accidentally sprayed canned air on preamp board when amp was live and had a mini explosion. Could be a gazillion...
by Henz
Wed Apr 24, 2019 4:29 pm
Forum: Vintage Amps (Before 1991)
Topic: White noise.
Replies: 5
Views: 964

Re: White noise.

Thanks for the replies. Don, yes. I try to keep all leads neat and as close as possible to original place. I put in new other parts as well. I put a new 1000pf ceramic disc cap (C27) in lead circuit. The original had a pin hole in it. I read that , at times, the quality,manufacturer.... etc of new p...
by Henz
Mon Apr 22, 2019 12:59 am
Forum: Vintage Amps (Before 1991)
Topic: Praying
Replies: 0
Views: 603

Praying

Hoping, ... I hope and pray that the techs who used to help us peeps are still above ground. Silence is deafening.
by Henz
Sun Apr 21, 2019 12:45 pm
Forum: Vintage Amps (Before 1991)
Topic: Redplating problem
Replies: 18
Views: 7399

Re: Redplating problem

Greetings. I know this is an old thread and was interesting. So which ones were open? The bias in (E) 220k's , or the 220k's , or I think you said they were 150k's going to pin 5 of outer sockets? Thanks, Jim
by Henz
Tue Apr 16, 2019 1:46 am
Forum: Vintage Amps (Before 1991)
Topic: Solo Head 50 low output
Replies: 6
Views: 1089

Re: Solo Head 50 low output

Post deleted.
by Henz
Mon Apr 15, 2019 11:20 pm
Forum: Vintage Amps (Before 1991)
Topic: White noise.
Replies: 5
Views: 964

White noise.

after recapping my DRG, with same pedals in front, hiss increased dramatically. Any advice?