What’s on *YOUR* workbench?
- Thread starter Bricksnbeatles
- Start date
Feral Feline
Well-known member
i mean no such thing as "just" a valco. Valcos are
My favourite is the 6161. Two oval speakers, and a little round tweeter, with heaps of style. Liked these since before there was Internet...
finebyfine
Well-known member
Taking sabbath worship to a whole new level
Fama
Well-known member
Viceroy, fired up right away but clearly has way too little gain and level. First suspect is the JFET's, I used MMBF4393's since I couldn't find PF5102's, but the pinout should be correct and the original thread by Chuck says
Also used a 2N5088 for Q4, but the gain difference there is hFE 300 to 400 or 350 to 450 according to the datasheet, so a difference, but shouldn't be that huge.
Edit: Q1 has 1.5V and doesn't boost the signal very much (obviously), so I'll try switching that one out I guess. The resistors around it seemed to be correct based on the color bands, although I'm mostly guessing the color bands since fuck me if I can tell between brown and red for sure, or whether something is gray or violet for example. Especially round here where the sun shines for 15 minutes every third day so I have to rely on lights which cause heavy reflections on the resistor :F
Edit2: Nope, switching Q1 did not help, so there must be something else wrong. Maybe I should post a troubleshooting thread.
So I think the MMBF4393's should be fine here. "Slightly lower gain" doesn't really describe what I get, it's barely above unity and is a really weak low gain OD if I dime everything, going into maybe mid gain OD range with the juice dimed.
Also used a 2N5088 for Q4, but the gain difference there is hFE 300 to 400 or 350 to 450 according to the datasheet, so a difference, but shouldn't be that huge.
Edit: Q1 has 1.5V and doesn't boost the signal very much (obviously), so I'll try switching that one out I guess. The resistors around it seemed to be correct based on the color bands, although I'm mostly guessing the color bands since fuck me if I can tell between brown and red for sure, or whether something is gray or violet for example. Especially round here where the sun shines for 15 minutes every third day so I have to rely on lights which cause heavy reflections on the resistor :F
Edit2: Nope, switching Q1 did not help, so there must be something else wrong. Maybe I should post a troubleshooting thread.
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Paradox916
Well-known member
What’s on my work bench? Another mess…
There that’s better…
There that’s better…
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jhaneyzz
Well-known member
Shouldn't you be working...?
drgonzo1969
Well-known member
Checking in on PPCB forum at work is a must for mental health
steviejr92
Authorized Vendor
Going for an updated 60s vibe with this new batch. Here’s the first color-way…
Erik S
Well-known member
Holy Shit.Going for an updated 60s vibe with this new batch. Here’s the first color-way…
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If that's for sale, I'll take it.
steviejr92
Authorized Vendor
It will be once im done with the entire batch!!!
KR Sound
Well-known member
Dibs!Going for an updated 60s vibe with this new batch. Here’s the first color-way…
View attachment 63751
View attachment 63752
steviejr92
Authorized Vendor
I think @Erik S claimed it already but I will try to make another for sure!
Dysvalence
Member
Recently got a cheap gpio header interface for my rpi3 to experiment with banging my head on the wall over repo/driver configuration problems the various developments in the pi plugins space before deciding if I wanna go all out with a pi5 based modeler or just have something pi3 or pi zero based to cover tuning or time effects. Currently experimenting with piOS lite+pipedal+NAM and trying to get it in a stable config before I wire it up, though I'll probably also try ElkOS+sushi+Proteus at some point.
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