Search found 259 matches

by alexradium
30 Jun 2020, 06:33
Forum: Boutique Stompboxes dissected...
Topic: Xotic - AC Booster [ goop-alarm ] [traced]
Replies: 129
Views: 37318

Re: Xotic - AC Booster [ goop-alarm ] [traced]

Typical soldering jockey mojo,like that 470 ohm cc resistor on output
by alexradium
21 Jun 2020, 10:33
Forum: Amplifiers
Topic: How to improve tube amplifier tone by changing one part
Replies: 101
Views: 5375

Re: How to improve tube amplifier tone by changing one part

if the sound changes with a perfectly clean signal through 2 specific different capacitors,then you have distortion,on one or both.
which should be measurable to a degree,especially with a 2 tone IMD test.
by alexradium
02 May 2020, 12:06
Forum: Pimp-My-Cheap-Pedal
Topic: Mosky Brown, a Pinnacle II clone
Replies: 8
Views: 722

Re: Mosky Brown, a Pinnacle II clone

i'll tell you this,all those differences are just minor and those which count are basically in the biasing of the jfets,which was really specific in Wampler's case,he had them tested for the specific circuit and nobody knows the exact specs,plus he went through different layouts too,that makes a hig...
by alexradium
28 Apr 2020, 20:55
Forum: Pedal Debugging & Troubleshooting Support
Topic: Broken Dunlop 95Q... SMD help!
Replies: 12
Views: 533

Re: Broken Dunlop 95Q... SMD help!

yes,there is a low temperature solder that helps,quick something.... or you can try carefully cut the legs of the chip and then remove the rest with the iron. or using one of those 100w "gun" irons,remove the original tip,and replace it with a copper wire shaped rectangular,the long sides at the sam...
by alexradium
25 Apr 2020, 09:48
Forum: Pedal Debugging & Troubleshooting Support
Topic: Bench charge for pedal SMD repair??
Replies: 4
Views: 259

Re: Bench charge for pedal SMD repair??

Thanks for the tip. I'll take a second look. The opamps looked in tact but maybe I missed it. I've read that reverse polarity usually takes out a diode or two near the power jack but they look fine. I do this as a hobby now (retired) so I won't charge much (maybe 12 pack of beer or toilet paper) if...
by alexradium
25 Mar 2020, 08:56
Forum: Boutique Stompboxes dissected...
Topic: Xotic Effects SL Drive (Gutshots)
Replies: 10
Views: 6965

Re: Xotic Effects SL Drive (Gutshots)

send me one and i'll do it for you
by alexradium
05 Mar 2020, 08:04
Forum: Software Room
Topic: Gaussmarkov Eagle and LTspice tutorials
Replies: 5
Views: 885

Re: Gaussmarkov Eagle and LTspice tutorials

I could see some with way back machine
by alexradium
09 Jan 2020, 19:44
Forum: Amplifiers
Topic: Madamp M15MK1 build help....
Replies: 20
Views: 4265

Re: Amp build help....

insert the cap between the input jack tip and the joint of 1M and the 33k resistors
by alexradium
08 Jan 2020, 18:03
Forum: Amplifiers
Topic: Madamp M15MK1 build help....
Replies: 20
Views: 4265

Re: Amp build help....

i checked your schematic,and yes,its 123 to 133V on the first stages,that calls for dc leakage...
by alexradium
08 Jan 2020, 17:40
Forum: Amplifiers
Topic: Madamp M15MK1 build help....
Replies: 20
Views: 4265

Re: Amp build help....

Bumping my own thread! I managed to fix this amp eventually; after much checking and head scratching I could find no defective components or bad/incorrect connections. I negotiated a credit for another output transformer from the supplier. The amp now produces a rich and complex sound! One minor cr...
by alexradium
20 Dec 2019, 20:20
Forum: Boutique Stompboxes dissected...
Topic: Hermida Audio - Mosferato M2 (2004)
Replies: 5
Views: 841

Re: Hermida Audio - Mosferato M2 (2004)

every time a solder jockey goops his clipping diodes,a honest engineer dies somewhere.
by alexradium
20 Dec 2019, 16:03
Forum: Boutique Stompboxes dissected...
Topic: Hermida Audio - Mosferato M2 (2004)
Replies: 5
Views: 841

Re: Hermida Audio - Mosferato M2 (2004)

In the next James Bond movie he will try to catch the secret hidden underneath that goop,Her Majesty wants to know!
Happy Gooped Holydays!
by alexradium
22 Nov 2019, 13:55
Forum: Amplifiers
Topic: Mesa Boogie Mark IV problem
Replies: 15
Views: 2070

Re: Mesa Boogie Mark IV problem

I have a Mesa Boogie Mark IV that doesn't fully power up or produce sound. When powered the tubes glow, but nothing else shows power. The amp doesn't make any sound but a decent hum that does change messing around with a couple dials. Where do I start? Apart from the good advice from other forumers...
by alexradium
02 Nov 2019, 16:37
Forum: Boutique Stompboxes dissected...
Topic: Suhr - Eclipse [traced]
Replies: 13
Views: 3927

Re: Suhr Eclipse [traced]

It looks similar to a reloaded Riot with 3 band active eq,isn't it?
by alexradium
27 Oct 2019, 08:03
Forum: Boutique Stompboxes dissected...
Topic: Darkglass Electronics - Microtubes B3K [traced]
Replies: 69
Views: 23886

Re: Darkglass Electronics - Microtubes B3K [traced]

I'm having a weird oscillation issue with the level and drive controls at max on this circuit that I can't really figure out. I've seen a few folks mention a similar issue but no apparent resolution. Im wondering if it could be an issue with the JFETs since the rest of the circuit should have much ...
by alexradium
23 Oct 2019, 09:42
Forum: Parts Sourcing & Trading
Topic: Effective, safe and lasting method against scratchy pots
Replies: 12
Views: 2015

Re: Effective, safe and lasting method against scratchy pots

Take care it's not due to electrolytic coupling caps,if they leak some DC the pots will scratch no matter how well you clean them
by alexradium
11 Oct 2019, 10:28
Forum: Amplifiers
Topic: the right diode bridge ampere
Replies: 16
Views: 2799

Re: the right diode bridge ampere

For a continuous load, the bridge rectifier will dissipate about 9W of heat. IIRC that should be 6W (Maybe if 6 was 9 it would correct.) the only available diode bridge here in our place is 25 ampere...so i can use this?? I was just referring to that bridge,it costs just a bit more than a plain 4A ...
by alexradium
10 Oct 2019, 07:01
Forum: Amplifiers
Topic: the right diode bridge ampere
Replies: 16
Views: 2799

Re: the right diode bridge ampere

25A
by alexradium
03 Aug 2019, 07:29
Forum: Boutique Stompboxes dissected...
Topic: Benson Preamp [traced]
Replies: 89
Views: 22646

Re: Benson Preamp [traced]

all in all,a tweaked plexi drive from Wampler.
The power of hype.
by alexradium
18 Jul 2019, 19:03
Forum: DIY Stompbox designs
Topic: Madbead Fencepost Noise Gate
Replies: 3
Views: 2490

Re: Madbead Fencepost Noise Gate

elkulon wrote:So... what's the veredict?
it failed miserably,i wouldn't bother,its just that i had the parts and curiosity on the subject.