Pumpkin preamp - ordered by Steen , official making thread - Page 336 - diyAudio
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Old 20th January 2012, 01:34 AM   #3351
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Quote:
Originally Posted by lykkedk View Post
NoProb...

Actually i get it working, but back then i got some serious problem, as i describet before, with unstability and like... I also have the problem, with DC -squeezzing on input, which i bellive was solved later, when other reported in the same problem... Still unsure if that had something to do with my problems.

Well the Pumkin was playing for a month or two, dispite thoose problem, but looking at a oscilloscope, 1. channel was very wrong. - Again it could be other problems, besides PCB layout. -Also i would like to say, that my PSU was a mockup ala' BoSoZ zener / mosfet regulated model... so it was not ideal either... Well i have had a lot of fun anyway with this *Pumpkin... and still proud beeing the first "prototype", besides ZenMods own ofcause...

ZenMod ? - Do you actually still have theese pcb's for shunty + pumpkin ???

Jesper.
So, problems could arise from PCB Layout, component selections, PSU.

Ps: ZM, sorry for cloning your design
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Old 20th January 2012, 09:35 AM   #3352
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Quote:
Originally Posted by Zen Mod View Post
funny flu without temperature and I feel funny even without any meds
There you go, point proven.
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Old 20th January 2012, 09:44 AM   #3353
Zen Mod is offline Zen Mod  Serbia
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that's baaaad woodoo from Lalaland !

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Old 20th January 2012, 11:43 AM   #3354
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Quote:
Originally Posted by Zen Mod View Post
sorry

sent few mins ago , as soon I sit by my PC to do some typing tonight

I'm sort of high last 24 hrs - I have funny flu without temperature and I feel funny even without any meds

Tanks got it and I am eager to folow up will keep that discussion on Email.

Still to be said in public You are kind and upright bloke

Thats why you feel funny you need the meds

Meds make you be funny and forghet the flu.


Old grand ma remedy

Thinly slice same carots and cover with loads of shugar let it rest in fridge
and later drink Juice

Work alla time
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Old 21st January 2012, 02:58 PM   #3355
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Quote:
Originally Posted by didiet78 View Post
... I don't want end up like Katieandad, got oscillation problem and still unsolved ...
Forget it, In my opinion, what Katieandad did here was just plain nasty trolling ...
And his problem is not the Pkin ...

PCB layouting is not trivial, as lykkedk stated.
Most of us have perfectly working Pumpkins so we know that ZM PCBs are well layouted and working... I would go for it ...
And if something goes wrong during building you will get assistance here

My 2 cents

Manu
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Old 7th February 2012, 04:43 PM   #3356
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Paprara rara rara (Angels trumpets and devil trombones)
Gues what?
I got my Pumpkin and Shunty boards from vgeorge which I would like to tank here.

Realy preaty things they are I have been waiting so long that I feel sorry to put my soldering Iron on those biuties.
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Old 10th February 2012, 10:05 AM   #3357
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OK I will try to wrap up warm and get started
Grappa is big no no as I will still have to go to work for next couple of days.
I was wondering if it would be possible to get a guide to comon faults with the circuit boards (there is always same)
I was thinking about running a "MEGA" between traks before starting to solder the components.

Help preaty please
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Old 10th February 2012, 10:06 AM   #3358
Zen Mod is offline Zen Mod  Serbia
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all possible faults were short between upper gnd plane and traces

buzzer test
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Old 10th February 2012, 10:47 AM   #3359
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Tanks for that it is sometink I can cek in the warmth of my PC room.
Or even beter tonight at work between break downs
Buzzer nah 250 V 500 V mega like I use to test motor vindings
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Old 11th February 2012, 12:27 AM   #3360
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And another daft question
OR a question that has been ansvered a gazilion times.

Traffos?

I have been looking around for trafos and standard stuff with small VA rating does came with a limited range of output voltages .

What are the reccomended minimum and maximum reccomended secondary voltages and VA ratings?

Help please Farnell list 160VA vith voltages of 30-30 the next oe is 55 - 55
I am prety shure I have seen somwhere that recomended voltages shuld be 42 - 42
For smaler VA ratings choice is even smaler.

I would if possible stick with UK manufacturer as Postagge is a killer.

Amplimo got same beter choice so most probably I will have to go there

Last edited by Bksabath; 11th February 2012 at 12:30 AM.
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