JMI Vox - Grey Wah c. 1967
- sinner
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This thing making me hard on! I have a couple of internal picts, but no shots under the board. Since it's not so complicated this should be easy to make an exact clone.
Here's some info about components used http://wah-wah.co.uk/greyvox.html
And the picts
Here's some info about components used http://wah-wah.co.uk/greyvox.html
And the picts
- analogguru
- Old Solderhand
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There is nothing important under the board - the connections are all made left and right of the board and visible.sinner wrote:This thing making me hard on! I have a couple of internal picts, but no shots under the board.
analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.
- Electric Warrior
- Diode Debunker
It's a clyde without the resistor in parallel with the inductor. The inductur supposedly measures 250mH.
- sinner
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analogguru wrote:There is nothing important under the board - the connections are all made left and right of the board and visible.sinner wrote:This thing making me hard on! I have a couple of internal picts, but no shots under the board.
analogguru
So this will be simple to draw, I'll do it when I'll back to work, now 3 days ofElectric Warrior wrote:It's a clyde without the resistor in parallel with the inductor. The inductur supposedly measures 250mH.
- Bernardduur
- Transistor Tuner
Now does it sound? For example compared to a standard Vox / Dunlop wah????
'No more....... loud music.......'
Follow my love for pedals and amps on https://bernardduur.blogspot.com and https://www.instagram.com/bernardduur1
Follow my love for pedals and amps on https://bernardduur.blogspot.com and https://www.instagram.com/bernardduur1
- phibes
- Transistor Tuner
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Paco, who did the refab board in the very top picture? I was expecting to see JMI doing a reissue of these since that's been there jig but I'm glad to see that's not the case. I always kinda wanted to build one of these up in the vintage fashion. Did you draw a layout yet or you want me to?
...I bet someone at JMI is drawing up plans as we speak.
...I bet someone at JMI is drawing up plans as we speak.
GuitarlCarl - "TGP = The Gear Polishers"
Ken
Ken
I'm amazed by all the hullabaloo on TGP about this series wah. I've had a number of these through my hands and was never impressed by their sound. A thin whine just doesn't do it for me. Then again, I'm not the favored dog in that race anymore...
Nice work doing the repro layout.
Nice work doing the repro layout.
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Tighter, thinner sweep. A lot less low end, more emphasis on high end and upper midrange. Page used one in The Yardbirds and the first couple Zeppelin albums. Also featured in the RAH '70 DVD.Bernardduur wrote:Now does it sound? For example compared to a standard Vox / Dunlop wah????
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That's Stuart Castledine's work. www.wah-wah.co.ukphibes wrote:Paco, who did the refab board in the very top picture?
Brad/Creepy Fingers built me a mean clone! "Thin whine" is a good description. lol. I really dig the wah tones Page got and I believe The Pretty Things used one on the S.F. Sorrow album.
- sinner
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No idea, my buddy send me those picts by email, it comes from DAM's forum AFAIR, I can't find this topic out there, I have to ask Johnny where to lookphibes wrote:Paco, who did the refab board in the very top picture?
Don't you dare, live it to Paco. Paco turned 30 today, and since his old he need to have a brain exercises. I'll do it day after tomorrow, as I've lost my head some ware yesterday and I'll lose it again todayphibes wrote:Did you draw a layout yet or you want me to?
...I bet someone at JMI is drawing up plans as we speak.
Sir, it's not about the sound it does, it's for education, and I mean really I've find out that while I was doing R&D of my FF builds, I'm almost ready with 5 clones from different era, with a lot of care to details. Great fun, I need it with wahwahs now, I will repro every fucking classic out thereGeoffrey Teese wrote:I'm amazed by all the hullabaloo on TGP about this series wah. I've had a number of these through my hands and was never impressed by their sound. A thin whine just doesn't do it for me. Then again, I'm not the favored dog in that race anymore...
I'll understand if you don't, as its your bread, but can you post some more details of the components used there? Brand, type, any differences between units you had in your hands? what is the pot value, anything you will to share?
- Dan N
- Resistor Ronker
The Thomas Organ part # for a 250mh inductor is 80-5044-7. Organ Service Corp. ( http://www.organservice.com/ ) have them on their stock list for $8.00. I don't know exactly what OSC stocks, but they replace a brown TDK in a Fasel style package.
Maybe email them for more info? You can tell them you want to replace a #44 from a rhythm unit. That should get you the right thing.
Maybe email them for more info? You can tell them you want to replace a #44 from a rhythm unit. That should get you the right thing.
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- Thomas Organ Co part catalog.xlsx
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Dick joke has expired.
- theehman
- Diode Debunker
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Order several and I'll take a couple.Dan N wrote:The Thomas Organ part # for a 250mh inductor is 80-5044-7. Organ Service Corp. ( http://www.organservice.com/ ) have them on their stock list for $8.00. I don't know exactly what OSC stocks, but they replace a brown TDK in a Fasel style package.
Maybe email them for more info? You can tell them you want to replace a #44 from a rhythm unit. That should get you the right thing.
Ron Neely II
Electro-Harmonix info: http://electroharmonix.vintageusaguitars.com
Home of RonSound effects: http://www.ronsound.com
fx schematics and repairs
Electro-Harmonix info: http://electroharmonix.vintageusaguitars.com
Home of RonSound effects: http://www.ronsound.com
fx schematics and repairs
The wah pot is a simple 100K audio taper, nothing sexy or made with unobtainium in the whole piece.
BTW-A lot of the "Icar Taper" 100K pots on the market are actually audio taper, at least according to CTS (who makes 99% of them).
BTW-A lot of the "Icar Taper" 100K pots on the market are actually audio taper, at least according to CTS (who makes 99% of them).
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Dan N wrote:The Thomas Organ part # for a 250mh inductor is 80-5044-7. Organ Service Corp. ( http://www.organservice.com/ ) have them on their stock list for $8.00. I don't know exactly what OSC stocks, but they replace a brown TDK in a Fasel style package.
Maybe email them for more info? You can tell them you want to replace a #44 from a rhythm unit. That should get you the right thing.
Thanks for the info, but fuckem, I'll wind my own, It's also education process and should be fun
Thanks Geoffrey! Any idea what range of transistor hfe should work best?Geoffrey Teese wrote:The wah pot is a simple 100K audio taper, nothing sexy or made with unobtainium in the whole piece.
BTW-A lot of the "Icar Taper" 100K pots on the market are actually audio taper, at least according to CTS (who makes 99% of them).
- phibes
- Transistor Tuner
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Nice on the inductor info! I'll have to order one. Might as well add another wah to the family.
GuitarlCarl - "TGP = The Gear Polishers"
Ken
Ken
- mictester
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... and a good equivalent for the 3707 is a BC184L - same pin out, same gain range.Solidhex wrote: Also know that the Texas Instruments 2n3707 have a ECB pinout instead of the usual EBC.
"Why is it humming?" "Because it doesn't know the words!"
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Is the schematics from Fuzz Central is correct?
I see no jumper or wire connection between 22k resistor and 470k resistor coming from Q2 base on photos...
I see no jumper or wire connection between 22k resistor and 470k resistor coming from Q2 base on photos...
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This is what I have already, also you'll find DIY Layout Creator project file attached just in case if you can correct it. It doesn't have connection mentioned by me in my previous post, so it might be wrong
As per transistors Hfe - datasheet shows that 2n3707 is in range of 100-400, so I suspect it should be in middle of this
As per transistors Hfe - datasheet shows that 2n3707 is in range of 100-400, so I suspect it should be in middle of this
mod wrote:file removed - see updated revision below
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I believe its correct now, don't thank - it's my duty