Search found 115 matches

by robinbowes
29 Dec 2019, 17:39
Forum: DIY Projects
Topic: A Switching Scheme [documentation]
Replies: 267
Views: 75284

Re: A Switching Scheme [documentation]

I had a run of switching PCBs made, and spent several evenings soldering the parts into them. I made (as I recall) about 220 of the boards. I know that I've got more of the PCBs - somewhere - but they've been buried amongst a lot of other, more deserving projects when I moved house! If you did happ...
by robinbowes
16 May 2019, 17:15
Forum: DIY Projects
Topic: A Switching Scheme [documentation]
Replies: 267
Views: 75284

Re: A Switching Scheme [documentation]

Here's a drop in PCB that uses a momentary switch. Haven't yet built it, but all looks good. 1.1375" x 1.0500". [ Image ] .brd - http://dl.dropbox.com/u/8021347/Relay.brd .sch - http://dl.dropbox.com/u/8021347/Relay.sch I don't suppose anyone happens to have these files? The dropbox links...
by robinbowes
28 Sep 2018, 22:33
Forum: Boutique Stompboxes dissected...
Topic: Lovepedal - Tchula [traced]
Replies: 25
Views: 15874

Re: Lovepedal - Tchula [traced]

Just a modified COT50 with a footswitch to select between different components coming off the emitter. Here's the schematic: [ Image ] Perf/PCB layout: [ Image ] And a vero layout for kicks: [ Image ] Image links are broken - I don't suppose anyone has them and can upload elsewhere? Many thank! R.
by robinbowes
23 May 2018, 22:37
Forum: Parts & Tools Sourcing & Trading
Topic: 1:1 transformer (for audio isolation)
Replies: 20
Views: 12690

Re: 1:1 transformer (for audio isolation)

I've successfully used the Xicon 42TM018-RC transformer, which is 1:1 with 10k impedance on both sides. Data sheet: http://www.mouser.com/ds/2/449/XC-600134-1212477.pdf I got mine for less than 4 bucks each at Mouser. The data sheet says the 3dB frequency response is 300Hz to 3.4kHz, but don't be a...
by robinbowes
06 Apr 2018, 12:51
Forum: Parts & Tools Sourcing & Trading
Topic: 1:1 transformer (for audio isolation)
Replies: 20
Views: 12690

Re: 1:1 transformer (for audio isolation)

Crikey, they're not cheap.

I was considering making a homemade Radial IC-1 ( http://www.radialeng.com/icecube.php ) but it's not worth it at that price.

R.
by robinbowes
05 Apr 2018, 23:52
Forum: Parts & Tools Sourcing & Trading
Topic: 1:1 transformer (for audio isolation)
Replies: 20
Views: 12690

Re: 1:1 transformer (for audio isolation)

roseblood11 wrote:Good transformers for high impedance signals aren't cheap. I used the Lehle LTHZ in some pedals, it's the same that is used in the Lehle P-Split II isolation box. The P-Split is always in my guitar case, every guitarist should have one...

[ Image ]
Any idea where to buy the LTHZ?

R.
by robinbowes
08 Feb 2018, 10:52
Forum: DIY Projects
Topic: BAJA Real Tube Drive pedal project [documentation]
Replies: 792
Views: 171816

Re: BAJA Real Tube Drive pedal project [documentation]

Hi Steve, is your power supply a simple transformer transforming the standard house volage from 220VAC to 16VAC (non regulated obviously - it is only transformer). I have one so I am looking to use it simple connecting cables and printing 3d case for it instead of buying one. They are not that chea...
by robinbowes
04 Aug 2016, 23:16
Forum: DIY Projects
Topic: BAJA Real Tube Drive pedal project [documentation]
Replies: 792
Views: 171816

Re: BAJA Real Tube Drive pedal project [documentation]

bajaman wrote:latest OSH park boards available now :wink:
Woohoo - can I get a set please? Do they come pre-cut?

I'll PM you.

R.
by robinbowes
21 Aug 2015, 20:05
Forum: DIY Projects
Topic: Mains switching for Vibratone (or other purposes)
Replies: 0
Views: 386

Mains switching for Vibratone (or other purposes)

I've built a Fender Vibratone clone using a Leslie mechanism from an old Farfisa organ and I wanted to be able to switch it remotely using a footswitch. I came up with this circuit: https://lh3.googleusercontent.com/-7fTyn3B9gCk/VdEMe9FQoQI/AAAAAAAAIMw/P8ucVAb2cy0/w940-h358-no/Vibratone%2BSwitching....
by robinbowes
02 Dec 2014, 01:38
Forum: DIY Projects
Topic: BAJA Real Tube Drive pedal project [documentation]
Replies: 792
Views: 171816

Re: BAJA Real Tube Drive pedal project [documentation]

Today, I found myself idly debating whether or not to buy a BK Butler Tube Driver. I was googling around for schematics to see which model the Tube Driver was when I found Baja's schematics for bith the Tube Driver and the BRTD. I hadn't actually realised how similar they were. So, I rummaged around...
by robinbowes
10 May 2014, 22:58
Forum: Parts & Tools Sourcing & Trading
Topic: push-push switch for Yamaha SG
Replies: 2
Views: 2457

Re: push-push switch for Yamaha SG

Cheers, I'll take a look.

R.
by robinbowes
10 May 2014, 14:26
Forum: Parts & Tools Sourcing & Trading
Topic: push-push switch for Yamaha SG
Replies: 2
Views: 2457

push-push switch for Yamaha SG

Hi all, Does anyone know of a source for a replacement switch like this: https://lh3.googleusercontent.com/-DEMq9Ql-tCk/U241oZ1Mu1I/AAAAAAAACzY/b3R8J_C-2VU/w518-h691-no/20140510_151633.jpg It's from a Yamaha SG3000S tone pot and is used for coil-tapping. I have a complete replacement pot/switch that...
by robinbowes
03 May 2014, 22:39
Forum: Parts & Tools Sourcing & Trading
Topic: Want 100K lin expression pedal (or cheap wah shell)
Replies: 5
Views: 4814

Re: Want 100K lin expression pedal (or cheap wah shell)

This is the part: http://www.maplin.co.uk/p/100k-andohm-miniature-linear-single-gang-potentiometer-jm74r It is a perfect fit - exactly the same as the stock part except it has pcb-mount pins instead of solder tags, and the stock part has a slot in the end of the shaft. It works fine as an expression...
by robinbowes
02 May 2014, 16:43
Forum: Parts & Tools Sourcing & Trading
Topic: Want 100K lin expression pedal (or cheap wah shell)
Replies: 5
Views: 4814

Re: Want 100K lin expression pedal (or cheap wah shell)

So, I think I'm going to end up with multiple solutions for this. I've got a few Chinese Vox Wah shells coming from prehistoric (they're aluminium, apparently, and therefore lighter than the usualk zinc shells) together with a HotPots II 100K pot. I've also picked up a 100K linear pot that I hope wi...
by robinbowes
02 May 2014, 16:40
Forum: Parts & Tools Sourcing & Trading
Topic: Alpha 16mm B100k with longish metal shaft
Replies: 3
Views: 3083

Re: Alpha 16mm B100k with longish metal shaft

Mich: I think they might be a little too big to fit in the EV-5. apollomusicservice: Thanks for the detailed info, but I actually want to change the pot to a 100K linear pot to use as an expression pedal with an early DryBell Vibe Machine. The good news is that, thanks to Lucifer, I picked up someth...
by robinbowes
01 May 2014, 21:05
Forum: Parts & Tools Sourcing & Trading
Topic: Alpha 16mm B100k with longish metal shaft
Replies: 3
Views: 3083

Alpha 16mm B100k with longish metal shaft

Hi, The pot in the picture is from a Roland EV-5 Expression pedal and is B10k. I want to replace it with a B100K value. Does anyone one know where I might get hold of one? My google-fu has failed me. Thanks, R. https://lh4.googleusercontent.com/-Ul3XDESavUI/U2K0iUMxgyI/AAAAAAAACsk/p1tqHZOm6cw/w1141-...
by robinbowes
30 Apr 2014, 20:58
Forum: Parts & Tools Sourcing & Trading
Topic: Want 100K lin expression pedal (or cheap wah shell)
Replies: 5
Views: 4814

Re: Want 100K lin expression pedal (or cheap wah shell)

I've just picked up a non-working Crybaby. Jeez, it's heavy.

I really need something lightweight as I'm going to have at least two of these on my board - one for my wah, and at least one expression pedal.

Can anyone recommend a lightweight pedal/shell?

R.
by robinbowes
25 Apr 2014, 21:50
Forum: Parts & Tools Sourcing & Trading
Topic: Want 100K lin expression pedal (or cheap wah shell)
Replies: 5
Views: 4814

Want 100K lin expression pedal (or cheap wah shell)

I need a 100k lin expression pedal for my early edition DryBell V-1 Vibe Machine.

Anyone got or know a source of inexpensive expression pedal or wah shells in the UK?

R.
by robinbowes
22 Mar 2014, 16:35
Forum: DIY Projects
Topic: BAJA Real Tube Drive pedal project [documentation]
Replies: 792
Views: 171816

Re: BAJA Real Tube Drive pedal project [documentation]

NO NO NO Copachino - the pictures you have posted are for the Baja Mini Tube Overdrive pedal NOT the Baja Real Tube Drive pedal that this topic refers to :slap: This particular project uses the 6N17B mini tube NOT the 12AX7 (ECC83) tube :wink: Oooh, Mini Tube Overdrive, eh? I've not made one of tho...
by robinbowes
24 Feb 2014, 23:42
Forum: Parts & Tools Sourcing & Trading
Topic: Boss knobs
Replies: 3
Views: 2988

Boss knobs

Hi, Does anyone know where I can source a few replacement knobs for Boss pedals? I'm looking for a Level knob for an MZ-2 [1] and a complete set for a BD-2 [2] I'm in the UK so I guess a UK source would be most convenient. Thanks, R. [1] http://1.bp.blogspot.com/_bK3DvMXA4Ro/SpwpPsPQPlI/AAAAAAAAAFY/...