forum-vibe schematic or image completed board?

Started by bvdl, July 03, 2015, 09:51:20 AM

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bvdl

#20
Quote

    I think I might have overheated some electronic component, would you think this would be likely? There are no components that look abnormal.

If no components look abnormal, why do you think that?

Maybe I applied to much heat during soldering some transistors or electrolytic condensers?

Quote

    The connection of jacks, pots, DT3P and DT2P switche(s) and led's seem to be connected resembling different connections I found across the net regarding this project.

Reading many different descriptions of circuit that may or may not be the one you built is a good way to get confused.

that is why I asked someone who has the FV-5 board to show me how it is supposed to get wired, there's nothing to find on the www that is exactly clear.
Quote

    But maybe I should replace the elco's of the power regulator first to eleminate the possibility of having a broken power regulator?

What is an "elco"?

elco = elecrolytic condenser

I checked the polarity on the powersupply yes.


R.G.

Quote from: bvdl on December 23, 2015, 06:46:10 AM
Maybe I applied to much heat during soldering some transistors or electrolytic condensers?
I see. That is possible, but not too likely with modern parts. Generally it's only an issue with germanium transistors, and there aren't any of those in this design. And unless your soldering on the bottom side of the board is much worse than the top side, I don't think that is the issue.

Quotethat is why I asked someone who has the FV-5 board to show me how it is supposed to get wired, there's nothing to find on the www that is exactly clear.
OK.

Quoteelco = elecrolytic condenser
I understand now.

QuoteI checked the polarity on the powersupply yes.
OK.

With that clarified, have you tested the power connection pads on the PCB with your ohmmeter setting to see if there is an internal short circuit?

What is the meter reading of the dc voltage out of the wall wart when it is not connected to the circuit? And when it is?
R.G.

In response to the questions in the forum - PCB Layout for Musical Effects is available from The Book Patch. Search "PCB Layout" and it ought to appear.

bvdl

The resistance measured on the power pads is from 15 to 6 Ohms. With the wall wart connected it measures 0VDC on the same locations, although the Wall wart itself delivers 18.6 VDC. I have to say I connected the leads from the Wall wart connector to where the rectifier bridge would point +, if I follow the circuitdiagram it should be right since there is also a track on the PCB leading towards the collectors of the transistors of the section with the LDR's in it. This track then should resemble the B+ if i look at the circuitdiagram I think.
The positive sides of the regulator's 3 electrolitic condensers are connected in parallel with a resistor in between the positive legs.
I find it strange there is no diagram on the net containing this powersupply/regulator combination.

bvdl

#23
R.G.,

I figured out my wall warts connector (female) on the pedal had one lug soldered at the middle that connects to the upper positive lug when wall wart gets pulled out for use in battery powerd stompboxes. I got that one wrong when rewiring the whole thing... stupid mistake that is...
I swithed to the right positive lug and the pedal came alive a bit... the led reacts to the LFO, but the bulb still doesn't.
I'm going to try some trimpot setting here...
update:

Yes with the "lamp bias" trimpot rotated to one extend, the bulb of the LFO flashes, but doing so, it emits only weak light. You can just see the filament glowing harder and softer without really lighting the bulb. The power on the pads now measures the same Voltage as the power supply is suposed to deliver.
I'm going to search for a wrong resistor value in the circuit trace of the lamp bias trimpot. Or do you think this is normal?

Thanks for getting me on track!

Benny!

R.G.

Quote from: bvdl on December 23, 2015, 02:29:33 PM
I find it strange there is no diagram on the net containing this powersupply/regulator combination.
I do too, but then I didn't draw up the forum-vibe. My version of that, the Neovibe, has been being built since the late 1990s, so the schemo and build process is pretty well worked out.

QuoteYes with the "lamp bias" trimpot rotated to one extend, the bulb of the LFO flashes, but doing so, it emits only weak light. You can just see the filament glowing harder and softer without really lighting the bulb. The power on the pads now measures the same Voltage as the power supply is suposed to deliver.
I'm going to search for a wrong resistor value in the circuit trace of the lamp bias trimpot. Or do you think this is normal?
Good. You're now off and running with the "normal" kinds of problems.    :icon_biggrin: It may be a resistor value in the driver section, or it could just be that your particular lamp bulb is harder to drive. What kind did you use?
R.G.

In response to the questions in the forum - PCB Layout for Musical Effects is available from The Book Patch. Search "PCB Layout" and it ought to appear.

bvdl

Hi R.G.,

Miniature bulb 12V 75mA

The kit is purchased from dasmusikding.de and the bom and population of the PCB is as follows:
BOM: http://www.classicamplification.net/fv/files/fv_vint_05.htm

Circuit: http://www.classicamplification.net/fv/files/fv_sch_vint.htm

population of the board: http://www.classicamplification.net/fv/files/fv5_vint2n_03.htm

                                 http://www.classicamplification.net/fv/files/fv5_vint2n_02.htm

I used this wiring diagram straight from Dasmusikding.de's user forum... but it's in German and not entirely clear what is the ideal setup if it's not your language, as there are a few options discribed besides this one: (post nr 8 contains the diagram) http://musikding.rocks/wbb/index.php/Thread/417962-Forum-Vibe-Vintage-Verdrahtung/

I'm not expecting you to dig into all of this, but hope to help others who got the same kit, and have the same issues as I do.
This is the first of 6 kits I had trouble clearing out how to connect stuff, or find information to solve issues.
The other kits I built have been a very nice and rather easy experience.

Best, Benny.

bvdl

#26
I ended up using a 12V 40mA bulb. The circuit works now.

I made a nice decal, if interested let me know and I send it to you. It shouldn't have the cracks, that's something that went wrong when applying the decal. But it turns out nice I think.


ch1naski

Really old post to resurrect.

RG, if you see this, is the Neovibe layout still available? Didn't see it on Geofex
Mockingbird wish me luck.


ch1naski

#29
Quote from: PRR on December 12, 2023, 11:53:44 PM
Quote from: ch1naski on December 12, 2023, 09:16:16 PMis the Neovibe layout still available?

http://www.geofex.com/Article_Folders/univibe/vibeupdate.pdf
?



I get a 404 error on the link.

Edit: nvm, I copied and pasted link and it worked, thank you
Mockingbird wish me luck.

PRR

Quote from: ch1naski on December 13, 2023, 10:33:19 AMI get a 404 error on the link.

I get several sorts of errors.

The key seems to be that R.G.'s server does not do https, cryptographic delivery. This is essential for banking, moot for reading Vibe-writings from the last century. But different browsers handle this differently, and inconsistently.

Glad that copy/paste worked for you.
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R.G.

That's almost certainly the problem, Paul. I've resisted going off and buying a crypto certificate for geofex, but I may have to.

As a side note, the company that has hosted geofex since the late 1990s has been sold/merged, and they told me that they will not change the hosting/serving on the servers where geofex resides, so I may have to migrate the site in the near future. It's a PITA,  but computer enabled and automated criminals have so thoroughly infiltrated the internet that ... oops, I'm ranting again.
R.G.

In response to the questions in the forum - PCB Layout for Musical Effects is available from The Book Patch. Search "PCB Layout" and it ought to appear.

PRR

#32
Quote from: R.G. on December 14, 2023, 04:41:32 PMI may have to migrate the site in the near future. It's a PITA
While surfing p0rn, I stumbled over A2hosting. 
https://www.a2hosting.com/web-hosting/
https://www.a2hosting.com/web-hosting/compare/

They boast of "Free Website Migration" and a dedicated team to do that. https://www.a2hosting.com/about/free-migration/
I have my wonders. Today a low-performance plan may be $50/year, and how hard will they hump to move a complicated website at that rate? Yours looks simple except the frames and side-menus are very archaic. I have not (and won't) peek behind the curtains, but I was considering cloning www.bertramchandler.com but it is riddled with MS-specific 2001 ASP code/script. However a "dedicated migration team" should at least quickly tell you "OK" or "no way!".

A2 also has 'free temporary' sites so you can migrate and test without much/any risk or cost. (Yes, hosting has got THAT cheap.) And of course you always get a SSL cert, and the basic cert is often free (works for this site).

Of course picking site-services is risky business. No matter how much you search before you sign, there's always some unexpected glitch, or (like my host) next year they sell-out to a lower class of capitalist. And beware "review sites" with hidden interests and kickbacks.

FWIW, as of tonight A2 Hosting's "dedicated" is #3 on this apparently sincere web-review:
https://www.hostingadvice.com/how-to/best-dedicated-server-hosting/
(You prolly do not need $90/mo dedicated; ~$5/mo shared may be ample.)
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