Search found 517 matches

by Dr Tony Balls
07 May 2020, 12:34
Forum: Ready-To-Build Effect Projects
Topic: Triton Delay - Adding the "Glide" from EchoCzar to PT2399
Replies: 16
Views: 1017

Re: Triton Delay - Adding the "Glide" from EchoCzar to PT239

so how does it actually work? On the echoczar this "slide" is using the effect that the PLL is locking onto the voltage going into pin 9 and adjusting its clock frequency, why does it work here? I beleive, It works due to C20 providing kinda smooth transition (charge/discharge) between VCO clock ad...
by Dr Tony Balls
16 Apr 2020, 14:07
Forum: Parts Sourcing & Trading
Topic: Current source for Veroboard/Stripboard in US? [found/sold]
Replies: 1
Views: 446

Current source for Veroboard/Stripboard in US? [found/sold]

Who is everyone using for veroboard nowadays? I had been using Veroboard.com, who were awesome, but despite their URL it seems they no longer sell the stuff. I just ordered some stuff from Rapid Online which is okay, but the quality isnt really there. Holes tend to tear out when you cut traces and i...
by Dr Tony Balls
27 Mar 2020, 14:44
Forum: Ready-To-Build Effect Projects
Topic: Triton Delay - Adding the "Glide" from EchoCzar to PT2399
Replies: 16
Views: 1017

Re: Triton Delay - Adding the "Glide" from EchoCzar to PT239

Very cool! Ages ago I implemented something like a ramp control on a Leslie type effect, and I think this is similar. I'm not fully sure what that was, though. I have some notes that kinda look like a GEOFEX LERA but its a different circuit....not sure what it could be from.
by Dr Tony Balls
10 Jan 2020, 14:27
Forum: Ready-To-Build Effect Projects
Topic: BAJA Orange OTR120 Graphic MkII amplifier pedal 9v 160318
Replies: 5
Views: 1064

Re: BAJA Orange OTR120 Graphic MkII amplifier pedal 9v 16031

FWIW that's not how the filter switch on an OR120 works Agree - but it achieves the same result. In theory but the values you have here are also pretty far off from an Orange to have equivalent capacitance. On an Orange the equivalent at the six settings is roughly 68nF, 4.4nF, 2.3nF, 1.1nF, 500pF,...
by Dr Tony Balls
09 Jan 2020, 20:45
Forum: Ready-To-Build Effect Projects
Topic: BAJA Orange OTR120 Graphic MkII amplifier pedal 9v 160318
Replies: 5
Views: 1064

Re: BAJA Orange OTR120 Graphic MkII amplifier pedal 9v 16031

FWIW that's not how the filter switch on an OR120 works. The caps are actually in series. Not that the schematic isnt completely valid as its own thing, just making a note for clarity.
by Dr Tony Balls
20 Nov 2019, 19:00
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Electra MPC Module Schematics
Replies: 6
Views: 3480

Re: Electra MPC Module Schematics

Dont have any schematics, per se, but I can chime in with some info. Awhile back a friend sent me two MPC modules in hopes that could get them working. The problem being that I dont have an MPC guitar to test them on. So I built a little pedal that could accept MPC cartridges for testing and use. Bo...
by Dr Tony Balls
14 Oct 2019, 15:12
Forum: DIY Stompbox designs
Topic: (Real) JCM800 Pre-Amp in a box
Replies: 13
Views: 3660

Re: (Real) JCM800 Pre-Amp in a box

Looks pretty cool, but a question (maybe a dumb one?). Why even fuss with the DC/DC converter? Couldnt you just use an AC input like an amp and have a power transformer and rectifier?
by Dr Tony Balls
26 Jun 2019, 13:33
Forum: Amplifiers
Topic: B15-N Portaflex style preamp
Replies: 18
Views: 17683

Re: B15-N Portaflex style preamp

Sure: https://live.staticflickr.com/4418/36009416050_74c374404e_z.jpg https://live.staticflickr.com/4411/36009408550_feae068cd0_z.jpg https://live.staticflickr.com/4363/36009408520_54bb8b11a8_z.jpg https://live.staticflickr.com/4439/36009415170_701892b89f_z.jpg Also, much more recently I made these ...
by Dr Tony Balls
28 Feb 2018, 15:23
Forum: Stuff Seen for Sale
Topic: I want an original style Rangemaster enclosure + front panel [sold]
Replies: 5
Views: 4103

Re: I want an original style Rangemaster enclosure + front p [sold]

If you take to him he might sell you an enclosure, provided he has some.
by Dr Tony Balls
26 Apr 2016, 13:30
Forum: Amplifiers
Topic: Building Marshall clone from scratch
Replies: 45
Views: 17479

Re: Building Marshall clone from scratch

FWIW.....it sounds like you want to build a small amp anyway, so this may be moot, but in general dont let anyone tell you that you cant build a full sized amp as your first build. A 50W Marshall was my first amp build. They arent complex amps at all and the voltages on a Champ are just as nasty.
by Dr Tony Balls
02 Dec 2015, 15:44
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Zeus Audio Systems - Model 8444 Pre-Amp [schematic]
Replies: 6
Views: 4562

Re: Zeus Audio Systems - Model 8444 Pre-Amp [schematic]

Dunno what it was used in originally, but the current user has it for guitar. The documentation for it said it could be used for a variety of uses including recording, hifi, guitar, etc. Some quick research tells me that this company was around in the early 80s, and for a bit used by Randy Rhodes an...
by Dr Tony Balls
01 Dec 2015, 19:39
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Zeus Audio Systems - Model 8444 Pre-Amp [schematic]
Replies: 6
Views: 4562

Zeus Audio Systems - Model 8444 Pre-Amp [schematic]

Had one of these obscure little buggers come across my bench recently so I thought id trace it. Its not exactly remarkable but does sound good. The original switching is garbage which is why ive highlighted to remove it. https://c1.staticflickr.com/1/775/23343786262_a86e26e096_c.jpg https://c2.stati...
by Dr Tony Balls
18 Mar 2015, 17:45
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Garnet Whirly-Gig (gutshots)
Replies: 16
Views: 7964

Re: Garnet Whirly-Gig (gutshots)

Nocentelli wrote:That looks pretty simple for a Leslie type effect: Handful of transistors, caps and resistors. I wonder if it's some sort of phase shift oscillator like the magnavibe.
But also I dont an optocoupler in there, which a Magnavibe would have....
by Dr Tony Balls
16 Mar 2015, 14:19
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Garnet Whirly-Gig (gutshots)
Replies: 16
Views: 7964

Re: Garnet Whirly-Gig (gutshots)

Rad! Do you plan on tracing out a schematic? It'd be pretty easy if you have unit in hand. Probably wouldnt be so hard to do from the pics, either, but some part values and transistor types would be missing.
by Dr Tony Balls
25 Nov 2014, 16:40
Forum: Amplifiers
Topic: tube safety
Replies: 6
Views: 3400

Re: tube safety

Books are unnecessary at this point because you can get the knowledge you need from the internet. What you're describing will work, yes, but its not exactly a sure-fire way. Better to do two things: 1. Build yourself a capacitor discharge tool. It can be as simple as an alligator clip and a stick, o...
by Dr Tony Balls
10 Nov 2014, 20:28
Forum: Parts Sourcing & Trading
Topic: Best place to get a 3PDT in Australia? [found/sold]
Replies: 7
Views: 6437

Best place to get a 3PDT in Australia? [found/sold]

Quick question....got a guy in Melbourne that has one of my builds and it needs a replacement 3PDT. Where's the best place (internet store, id assume) to get a 3PDT either in Australia or with easy/cheap shipping to Australia??
by Dr Tony Balls
15 Oct 2014, 14:13
Forum: Amplifiers
Topic: Vox AC15 power transformer replacement
Replies: 7
Views: 4389

Re: Vox AC15 power transformer replacement

Ok so I've opened up the amp and got the old transformer out and the new transformer mounted, according to the schematic from sinner's response, I'm only using the 0v common tap and the 245v tap on the primary side and the neutral leg from ac power in is fused. On the ac15hw1 there's an additional ...
by Dr Tony Balls
08 Oct 2014, 13:45
Forum: Amplifiers
Topic: Vox AC15 power transformer replacement
Replies: 7
Views: 4389

Re: Vox AC15 power transformer replacement

Depending on the specific version there may be specific needs, but in general there are a lot of transformers out there that will fit the bill for this. Anything spec'd for an 18W Marshall would be a good place to start, like so: http://www.classictone.net/Marshall-18W-Style-Transformers.html. But a...
by Dr Tony Balls
30 Sep 2014, 15:26
Forum: Parts Sourcing & Trading
Topic: Veroboard in the USA?
Replies: 7
Views: 3601

Re: Veroboard in the USA?

Frank_NH wrote:Be sure to get the epoxy fiber stripboard and not phenolic (phenolic is OK but is lighter duty than the epoxy fiber material).
I'd argue for the opposite. The phenolic stuff you can score and snap with a razor. The epoxy stuff you need to cut with a saw.