freestompboxes.org

andregarcia57 wrote:where can I find 2SC539 and 2SC828? or what is the best replacement for them, I remember neovibe mounted with 2n5088 ....

danielzink wrote:

andregarcia57 wrote:where can I find 2SC539 and 2SC828? or what is the best replacement for them, I remember neovibe mounted with 2n5088 ....

2sc539=2n5088: https://www.diystompboxes.com/smfforum/ ... ic=51507.0 (edit:fixed 2N5088 sorry)

2sc828: http://www.futurlec.com/Transistors/2SC828pr.shtml

sinner wrote:2n5088 have different pinout than 2SC828

Lot's of 2SC828 are on ebay, other option is BC183L - might be better option for lamp driver as it handles higher current

2SC539? forgetabaret... Go with BC108 ot any ordinary pinout-wise low noise alternatives

Note about the 2SC828. Datasheet says that this transistor issue had three rank marks:
Q- hfe bucket - 130/260
R - hfe bucket - 180/360
S - hfe bucket - 260/520

I have no idea what the rank in UV was, the only unit I had access to (info provided by The Rotagilla) had no rank marks

I'll try to update our website with more transistor info including Q voltages later today

andregarcia57 wrote:which would enclousure to mount it?
1590DD

I'm buying a spare in banzai ...

http://www.banzaimusic.com/2SC828.html
http://www.banzaimusic.com/220uF-40V-axial.html
http://www.banzaimusic.com/100uF-40V-axial.html
http://www.banzaimusic.com/Univibe-Upgrade-Kit.html
http://www.banzaimusic.com/Piher-Cermet-PT10-500R.html
http://www.banzaimusic.com/Alpha-24mm-m ... k-lin.html
http://www.banzaimusic.com/Alpha-24mm-STE-100k-log.html
http://www.banzaimusic.com/Alpha-24mm-mono-50k-lin.html


thanks

The Enclosure

At this point I have no exact enclosure dimensions, and I’m unable to draw the plans for one. This might change soon, so if you’re after exact crap, stay logged in. All I know for now is the footprint – and it’s 10″ x 7″

As an alternative I can recommend two Hammond brand cast aluminum models:

- Hammond 1550G – measures 222mm x 146mm x 55mm (8,74″ x 5,74″ x 2,16″) and it’s big enough to carry replica board without step-down transformer. Still keeps enough of free space for comfortable wiring route, as well as it’s tall enough to take pots, jacks, and switches on top of the board. It’s quite big, but this is the smallest one possible, trust me, I searched through all Hammond datasheets, and in my opinion this is the best choice. The trick is to mount the board to the enclosure lid like in original Uni-Vibe.

- Hammond 1550J is the other option. Measures 275mm x 175mm x 66mm (10,82″ x 6,89″ x 2,62″). So it’s close in footprint to past era Uni-Vibe – about the same size as the aircraft carrier. Will take our board easily with transformer and yo mama included. It’s the biggest cast alloy enclosure Hammond offers.

The choice is yours. I’ll go with 1550G in my build as I don’t think I’m brave enough to have wall powered pedal build by myself and the 1550G is still huge enough

sinner wrote: http://www.banzaimusic.com/100uF-40V-axial.html

UV has no 100uF caps, there is 1000uF in power supply part of the circuit

andregarcia57 wrote:

sinner wrote: http://www.banzaimusic.com/100uF-40V-axial.html

UV has no 100uF caps, there is 1000uF in power supply part of the circuit

ok thanks!

http://www.banzaimusic.com/F-T-1000uF-40V.html

beedotman wrote:Sorry for delay guys, I'm really pretty busy at work for last few days/weeks...
Anyway... I'm planing to post smaller board with some mods (input load and bulb driver) and mojo look and even smaller board for 1590p enclosure over weekend.
Here's preview

sinner wrote:Here's one with 1meg resistors in input preamp section as in unit traced by Wattson FX

https://www.ebay.com/itm/Vintage-Shin-E ... 2a238c9f3f

I have stored dozens of UV's but this is the first one with 1M I seen. I was sure till today that Wattson had an error in his schematic... Well he doesn't