Search found 774 matches

by Ice-9
27 Oct 2023, 17:57
Forum: Amplifiers
Topic: EVH - 5150 III Mini Stack [schematic]
Replies: 18
Views: 13494

Re: evh 5150 III mini stack schem [schematic]

Last correction - there's a resistor we forgot, it's r11, which is on the power/phones pcb. 560 ohm Hi Renegadrian, Yes, I was aware of the 560 Ohm resistor on the speaker/ headphone output board, but I just left the schematic at the output rather than include that switching. Spose I was being a bi...
by Ice-9
27 Oct 2023, 10:20
Forum: Amplifiers
Topic: EVH - 5150 III Mini Stack [schematic]
Replies: 18
Views: 13494

Re: evh 5150 III mini stack schem [schematic]

I think you wrote 2 caps wrong, c9 and c11 - basically they are 2 filters in the 9v line, I have 100n for c9 and 68p for c11 Yeah I have missed C9 from my second diagram 100n Oops. C11 on my stack measured 100n but that won't make any difference to the sound. I have updated the schematic in the thr...
by Ice-9
26 Oct 2023, 11:38
Forum: Amplifiers
Topic: EVH - 5150 III Mini Stack [schematic]
Replies: 18
Views: 13494

Re: evh 5150 III mini stack schem [schematic]

Renegadrian wrote: 26 Oct 2023, 11:27 you sure about r5? mine is grey red brown so it's 820. tester reads 804 ohm.
Yeah Mine is grey /red/black, it looked black to me but I suppose I could have misread the colour and i never measured it so if you measured yours and it was closer to 820R then use the same as you measured.
by Ice-9
26 Oct 2023, 10:32
Forum: Amplifiers
Topic: EVH - 5150 III Mini Stack [schematic]
Replies: 18
Views: 13494

Re: evh 5150 III mini stack schem [schematic]

I hhave also retraced the complete circuit and added all the values. I removed and measured all the caps, It looks like I hae only 2 differences to your values R5 =82 Ohms and C8 measured 170pf.
Image

Edit - Corrected R5
by Ice-9
26 Oct 2023, 09:30
Forum: Amplifiers
Topic: EVH - 5150 III Mini Stack [schematic]
Replies: 18
Views: 13494

Re: evh 5150 III mini stack schem [schematic]

I am going to re trace this today as my old schematic has a mistake, the volume pot is missing. This sits between the tone stack and the 386. After retracing I will mark all the component values.
by Ice-9
25 Oct 2023, 18:48
Forum: Amplifiers
Topic: EVH - 5150 III Mini Stack [schematic]
Replies: 18
Views: 13494

Re: evh 5150 III mini stack schem [schematic]

I found the schematic of the 5150 micro amp but this one doesn't have all the values marked. I can look at the original stack to complete the values in the schematic when I get a chance. for now here is the schematic as I drew it about 10 years ago. At least it gives you a good start and I will upda...
by Ice-9
25 Oct 2023, 18:35
Forum: Amplifiers
Topic: EVH - 5150 III Mini Stack [schematic]
Replies: 18
Views: 13494

Re: evh 5150 III mini stack schem [schematic]

Yeah that's the one I have, so I will see if i can find the paperwork first. I wouldn't get excited as it isn't very good.
by Ice-9
25 Oct 2023, 18:08
Forum: Amplifiers
Topic: EVH - 5150 III Mini Stack [schematic]
Replies: 18
Views: 13494

Re: evh 5150 III mini stack schem [schematic]

I do have it somewhere, I will try and find it. From memory it is a LM386M. If i can't find it (as I only drew it on paper), then as I still have the the mini stack i can reverse it again.

Just to clarify , are you talking about the 15watt head or the micro stack. I have the micro stack 1w toy amp.
by Ice-9
05 Sep 2023, 08:26
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Digitech - Bad Monkey [schematic]
Replies: 30
Views: 28658

Re: Digitech - Bad Monkey [schematic]

Those caps are not JUST to clean up noise It serves the job as a power supply noise filter AND it rejects AC signals from different parts of the circuit. two jobs but both similar. Capacitors block DC and allow AC to pass through. The audio signal itself is AC. Yeah, Oops. That's what i meant.
by Ice-9
01 Dec 2022, 17:29
Forum: Amplifiers
Topic: My Boss Katana KTN-100 Mk II Digital Modelling Amp
Replies: 3
Views: 707

Re: My Boss Katana KTN-100 Mk II Digital Modelling Amp

There is also an extended app that can access all the hidden features of the DSP, this gives you access to many more amp models and a really nice interface. You can install both the Boss tone studio and the extended katana app on your computer and still use them both. The extended app for hidden amp...
by Ice-9
31 Jul 2022, 17:09
Forum: Modern Stompbox Effects (1975 - ...)
Topic: EHX - Holy Stain [schematic]
Replies: 104
Views: 89603

Re: EHX - Holy Stain [schematic]

Yes, I am sorry that all the traces I made have 404'd after the loss of 'photobucket. Other than the fuzz part of the circuit the FV-1 side was only datasheet stuff using internal programs and not all of them. I did post mods in the thread to add an external eeprom and extra FV-1 pots but they have ...
by Ice-9
22 Jul 2022, 21:56
Forum: Modern Stompbox Effects (1975 - ...)
Topic: EHX - Holy Stain [schematic]
Replies: 104
Views: 89603

Re: Electro Harmonix - Holy Stain [GUT SHOTS] [schematic]

Here is an updated schematic, the only bits that need adding now are the fuzz effect, the 3pdt wiring and the program scroll switch. https://i90.photobucket.com/albums/k243/lenny1dog/holystain3.png Could you upload this schematic again please? Or anyone else who has it. Thanks. I'm very sorry as it...
by Ice-9
18 Jun 2022, 19:33
Forum: Parts & Tools Sourcing & Trading
Topic: NOS transistor scam on eBay
Replies: 13
Views: 2594

Re: NOS transistor scam on eBay

deltafred wrote: 18 Jun 2022, 13:25
uncleboko wrote: 18 Jun 2022, 11:32 Perhaps he was putting jam on his scones before the cream!!!
I'm not sure that many people outside the UK will get that. :D
Jam, cream, scones and Devon... Aye I get it.
by Ice-9
04 May 2022, 18:04
Forum: DIY Projects
Topic: FXCore Module - Compact Dev Board [documentation]
Replies: 14
Views: 15672

Re: FXCore Module - Compact Dev Board [documentation]

Yes agreed, I am waiting on AKM getting back into production. I did manage to get hold of 15 x AK4619 4 in/4 out pre production codecs a while back but if you only need 2 in/2out then I think Coolaudio have stock of the V4220 codecs which are clones of the Cirrus Logig CS4220. I might switch to the...
by Ice-9
01 May 2022, 19:17
Forum: DIY Projects
Topic: FXCore Module - Compact Dev Board [documentation]
Replies: 14
Views: 15672

Re: FXCore Module - Compact Dev Board [documentation]

Nice project, I was going to do something along the same lines but have put it off due to the shortage of Codec chips. Love the idea. Thanks! Yeah convertors are getting pretty scarce nowadays. Hope it'll get better once AKM gets back on its feet. Yes agreed, I am waiting on AKM getting back into p...
by Ice-9
27 Apr 2022, 21:38
Forum: DIY Projects
Topic: FXCore Module - Compact Dev Board [documentation]
Replies: 14
Views: 15672

Re: FXCore Module - Compact Dev Board [documentation]

Nice project, I was going to do something along the same lines but have put it off due to the shortage of Codec chips. Love the idea.
by Ice-9
17 Mar 2021, 21:51
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Mosky Plexi-m [schematic]
Replies: 26
Views: 15163

Re: Mosky Plexi-m [schematic]

I ordered a Plexi-m today. When I receive it I can find out the missing capacitance values in the signal path. With my PEAK LCR45 LCR and impedance meter I can measure the impedance of the RC circuits and determine the capacitor by calculation. I think I would be tempted to just remove and measure ...
by Ice-9
09 Mar 2021, 21:26
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Park - Auto Wah [schematic]
Replies: 32
Views: 17683

Re: Park - Auto Wah [schematic]

The basis of the speed control is build around an 'Astable Multivibrator circuit, this is also the basic building block of a flip-flop circuit which can be Astable, monostable and bistable as used in Boss style switching. In the case of the Park autowah it is the astable type with a control for spee...
by Ice-9
01 Jan 2021, 14:18
Forum: Parts & Tools Sourcing & Trading
Topic: What companies do small pub runs
Replies: 10
Views: 5976

Re: What companies do small pub runs

Aye it's crazy init as all the pubs are shut around here as well, something to do with some sort of new virus I have been hearing about lately but they were open when i posted this in 2019 lol.
Fingers crossed we all get a bit of normality back in 2021.
Happy New Year Deltafred.