Search found 751 matches

by bassbass
26 Mar 2018, 10:18
Forum: Electronics
Topic: Lightweight versatile bass smp
Replies: 5
Views: 258

Re: Lightweight versatile bass smp

If you are in Vic, last week I saw an Ashdown 600W amp head at cashies in Ringwood. I didn't test it so I've no idea if it works properly, but it was about 300 bucks, and Ashdown is well known for its warm tone.
by bassbass
24 Mar 2018, 20:05
Forum: Electronics
Topic: Using a single gang pot for a blend control
Replies: 5
Views: 178

Re: Using a single gang pot for a blend control

If your pickups are passive, it really won't work. If you use active EMGs, then it will kinda work. Try a linear 25k, 50k. You won't get a true single pickup sound, but you should be able to get an ok range of blend. If you make a twin buffer with op amps and connect the single gang linear pot direc...
by bassbass
21 Mar 2018, 18:30
Forum: Electronics
Topic: 20K dual Variable Resistor - centre indent - Resources?
Replies: 25
Views: 496

Re: 20K dual Variable Resistor - centre indent - Resources?

Oh, and be sure to cuut the wire a couple of inches back from the connector so you can re-wire it when the new pre arrives.
by bassbass
21 Mar 2018, 18:28
Forum: Electronics
Topic: 20K dual Variable Resistor - centre indent - Resources?
Replies: 25
Views: 496

Re: 20K dual Variable Resistor - centre indent - Resources?

Good luck man! PCB, especially surface mount boards, can drive you crazy...
by bassbass
21 Mar 2018, 18:24
Forum: Electronics
Topic: 20K dual Variable Resistor - centre indent - Resources?
Replies: 25
Views: 496

Re: 20K dual Variable Resistor - centre indent - Resources?

Yeah that sounds like a circuit board issue. Probably just a dry solder joint or something. Or maybe a dodgy connector from the pickup... If the signal is working from the bridge pickup, it means that the problem must be around the pickup connections or the blend pot and its directly related pcb tra...
by bassbass
20 Mar 2018, 23:18
Forum: Electronics
Topic: 20K dual Variable Resistor - centre indent - Resources?
Replies: 25
Views: 496

Re: 20K dual Variable Resistor - centre indent - Resources?

Bummer.

Hey, what actually was the original problem? I'm not sure you stated this...
by bassbass
20 Mar 2018, 10:54
Forum: Electronics
Topic: 20K dual Variable Resistor - centre indent - Resources?
Replies: 25
Views: 496

Re: 20K dual Variable Resistor - centre indent - Resources?

Sounds like the hot and earth are around the wrong way. In the centre, an MN blend pot has no resistance between the wiper and one outer lug - clockwise for one gang, and anti-clockwise for the other. Trouble is, there's no real standard. The clockwise short could be the top gang, or the bottom, and...
by bassbass
07 Mar 2018, 08:39
Forum: Electronics
Topic: 20K dual Variable Resistor - centre indent - Resources?
Replies: 25
Views: 496

Re: 20K dual Variable Resistor - centre indent - Resources?

Hey mate, no sweat. Good luck with the repair.
by bassbass
06 Mar 2018, 23:30
Forum: Electronics
Topic: 20K dual Variable Resistor - centre indent - Resources?
Replies: 25
Views: 496

Re: 20K dual Variable Resistor - centre indent - Resources?

Ouch. But that's the way of the world I'm afraid, with surface mount boards. So is it actually a dual gang linear pot? FWIW, EMG have used a 25K dual gang linear blend pot for their active pickups for well over 20 years. But in recent years it comes on a little pcb which you'd have to desolder to ma...
by bassbass
05 Mar 2018, 11:16
Forum: Electronics
Topic: 20K dual Variable Resistor - centre indent - Resources?
Replies: 25
Views: 496

Re: 20K dual Variable Resistor - centre indent - Resources?

PS: when pots fail in active preamps, I always test that they don't have DC across them. If there's another prob in the pre, say a bad cap, and the pot is between two different DC voltages, it will crackle when rotated and have a fairly short life. With multimeter set to VDC and the black probe to e...
by bassbass
05 Mar 2018, 11:09
Forum: Electronics
Topic: 20K dual Variable Resistor - centre indent - Resources?
Replies: 25
Views: 496

Re: 20K dual Variable Resistor - centre indent - Resources?

Cool. Well good luck mate. Happy to post one to ya if you can't otherwise work it out. They've been kicking around in my parts bins for years. They tested ok, though. They are just Alpha type ones, but would work fine as long as they are installed by someone with good soldering experience...
by bassbass
05 Mar 2018, 10:20
Forum: Electronics
Topic: 20K dual Variable Resistor - centre indent - Resources?
Replies: 25
Views: 496

Re: 20K dual Variable Resistor - centre indent - Resources?

PS:


BTW, is it actually busted, or just scratchy? Perhaps it just needs a squirt of contact cleaner...

Oh, and what about Fender Australia for a genuine part?...
by bassbass
04 Mar 2018, 19:54
Forum: Electronics
Topic: 20K dual Variable Resistor - centre indent - Resources?
Replies: 25
Views: 496

Re: 20K dual Variable Resistor - centre indent - Resources?

OK, cool, well I have 3 or 4 B25K dual gangs with centre clicks...
by bassbass
04 Mar 2018, 12:10
Forum: Electronics
Topic: 20K dual Variable Resistor - centre indent - Resources?
Replies: 25
Views: 496

Re: 20K dual Variable Resistor - centre indent - Resources?

What taper is it? If MN, then a 25K will work fine, and these are easy to find. If linear, then these are also easy to find without the centre click. 25K or 22K would work fine. (I have a feeling I might have a B20K with click though, I'll have a look...) If it's A/C, then that'll be harder to find....
by bassbass
27 Feb 2018, 16:46
Forum: Electronics
Topic: Stingray 3 band eq mods.
Replies: 34
Views: 898

Re: Stingray 3 band eq mods.

What's the new HPF frequency? The input op amp of this pre makes more sense when you see it drawn this way: http://i1248.photobucket.com/albums/hh498/frederickbloggs/MM%203-band%20input%20filter_zpsrotuslyi.jpg?t=1519624801 It's a fairly standard sallen-key 2nd order HPF. https://en.wikipedia.org/w...