MGI - Fuzz ( Orpheum , Clark )

Discussion regarding early stompbox technology: 1960-1975 Please keep discussion focused and contribute what info you have...
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foxfire
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Post by foxfire »

no real gut shots but i figured it couldn't hurt to post it.
MGI Fuzz A 01.jpeg
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MGI Fuzz A 02.jpeg
MGI Fuzz A 02.jpeg (66.47 KiB) Viewed 1547 times
MGI Fuzz A 03.jpeg
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analogguru
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Post by analogguru »

Thanks for the link. It´s the same as the Orpheum Fuzz and others (AAT, Andre, EU Wurlitzer, Gracin, Manny´s, Mica-Tone, Tim´s Own). The circuit is very similar to the first (Ge-)Mosrite Fuzzrites even when the newer of the above units used silicon transistors.

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Post by DiscoFreq »

analogguru wrote:Thanks for the link. It´s the same as the Orpheum Fuzz and others (AAT, Andre, EU Wurlitzer, Gracin, Manny´s, Mica-Tone, Tim´s Own). The circuit is very similar to the first (Ge-)Mosrite Fuzzrites even when the newer of the above units used silicon transistors.

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I didn't know these yet: EU Wurlitzer, Gracin
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Post by analogguru »

E.U. Wurlitzer had a "Fuzzer Buzzer" and Gracin was the "fubar".
Some of the units had three knobs, which is only an additional simple tone control - like on a guitar.

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Post by DiscoFreq »

Thanks!

Do you have a picture of the Gracin Fubar?
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analogguru
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Post by analogguru »

:hmmm: I have to look in my archive.....
Do you mean something like the thing below ?

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grishnakh
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Post by grishnakh »

fubar, in through the left and out through the right. :shock: Would probably drive me mad if I tried to put it in my effects chain.

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Post by modman »

Volume-Pot : CTS(#1346802) = Feb 1968
Tone-Pot : CTS(#1346802)
Transistors : 94047 × 2pcs
Jacks : Switchcraft
Switches : Carling

https://www.tcgakki.com/items10/tc106154.html

MGI Fuzz B 01.jpeg
MGI Fuzz B 01.jpeg (218.29 KiB) Viewed 1545 times
MGI Fuzz B 02.jpeg
MGI Fuzz B 02.jpeg (200.75 KiB) Viewed 1545 times
MGI Fuzz B 03.jpeg
MGI Fuzz B 03.jpeg (206.86 KiB) Viewed 1545 times
MGI Fuzz B 04.jpeg
MGI Fuzz B 04.jpeg (176.54 KiB) Viewed 1545 times
MGI Fuzz B 05.jpeg
MGI Fuzz B 05.jpeg (165.03 KiB) Viewed 1545 times
MGI Fuzz B 07.jpeg
MGI Fuzz B 07.jpeg (164.29 KiB) Viewed 1545 times
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BMS1971
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Post by BMS1971 »

Does anyone knows what transistors the GE and Si version used? Cannot read on the photos.

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Post by modman »

BMS1971 wrote: 12 Feb 2022, 11:25 Does anyone knows what transistors the GE and Si version used? Cannot read on the photos.
:D
modman wrote: 19 Jan 2022, 14:55 Volume-Pot : CTS(#1346802) = Feb 1968
Tone-Pot : CTS(#1346802)
Transistors : 94047 × 2pcs
Jacks : Switchcraft
Switches : Carling

https://www.tcgakki.com/items10/tc106154.html
https://www.weisd.com/products/690942-9 ... -transisto
https://www.alldatasheet.com/datasheet- ... 123AP.html
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BMS1971
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Post by BMS1971 »

And I found a good photo of the SI ones: 2N3566

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Post by BMS1971 »

Still no luck on the Germanium ones, the code 94047 don't match any transistor...
Benoit

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mozz
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Post by mozz »

Not being picky but.
Volume-Pot : CTS(#1346802) = Feb 1968
Wouldn't that be 2nd week in 1968 which would be January?

94047 is the silicon version as shown in the picture above. Kind of a weird package with top leads sheared off. Going to dig thru some boxes and see if i have any like that. 94047 is listed in the master transistor substitution handbook as 123AP but that is very generic transistor sub. Here are some Orpheum pictures.
16408782362_b47b2e8469_b.jpg
vqso6gqsqarige988qsl.webp
wagyixa1ctganubv82b2.webp
yqbzdirtrzhpiwbeszkc.webp

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