Pumpkin preamp - ordered by Steen , official making thread

[Zen Mod]

Workie, workie

Me too The pumpkin is getting a new home and bigger heatsinks , the case is with "see through lid"! Who could resist with all them green led's in there? Not me....

those two boxes looks too sissssssy

I hope that you boyz will put 'nuff holes in both lower and upper plate(s)

Pumpie is burnin' some 30++ Watts ...... overall .

 

[zettelsm]

Pumpkin volume control

Me too The pumpkin is getting a new home and bigger heatsinks , the case is with "see through lid"! Who could resist with all them green led's in there? Not me....

So Mr. Steen, do I see potentiometers in place of the Twisted Pear stepped volume control and input-output boards?

Would you care to elaborate on the changes and effects on sound, if any? I would like to benefit from your experience and reasons for the changes. . .

Thanks!

Steve Z

 

[Zen Mod]

Re: Pumpkin volume control

So Mr. Steen, do I see potentiometers in place of the Twisted Pear stepped volume control and input-output boards?

Would you care to elaborate on the changes and effects on sound, if any? I would like to benefit from your experience and reasons for the changes. . .

Thanks!

Steve Z

naah

don't count too much on his xperience ........ on next pic you'll see flies instead of pot

(talking about ........ once I mounted watering can instead of TV antenna on the roof , naturally with antenna cable connected to it ........ just to tease my neighbors .......... they have strange look few days ............ )

 

[zettelsm]

Steenoe's Pumpkin revised

Looking closer I see he had done away with input and output connectors too. Very nice trick -- two less connectors in the signal path. In fact, there are no connectors or controls anywhere on the new box!

Steve Z

 

[spavleski]

Completed !!!! Working !!!!

Now, most probably, the doctors would have to come to "take off" the constant smile from my face

 

[spavleski]

 

[spavleski]

@Zen, Pot problem with "Crrrr" during rotation has gone after setting Bias to ZERO.

T H A N K S !!!

 

[Zen Mod]

@Zen, Pot problem with "Crrrr" during rotation has gone after setting Bias to ZERO.

............

not likely "BIAS" .........

"offset" ..........more likely .........

 

[spavleski]

not likely "BIAS" .........

"offset" ..........more likely .........

Yes, "Biasing" the offset ;-)

 

[Zen Mod]

Yes, "Biasing" the offset ;-)

ziv mi ti

 

[spavleski]

@Zen - Ziv mi ti - ocekuj peceno prase ako moze da se posalje City Expressom

For other colleagues - Sorry for Serbian language

 

[spavleski]

@Zen...You know what's behind the loudspeaker?

...


...


... 300B SE Tube Amp...

... Now one can imagine the sound of Pumpkin...

 

[Magura]

Completed !!!! Working !!!!

Now, most probably, the doctors would have to come to "take off" the constant smile from my face

How warm does it become after a couple of hours?


Magura

 

[spavleski]

How warm does it become after a couple of hours?


Magura

I am not appropriate person to answer, because I have Alepx J modification by Zen - BablelFish - Comparing to him, Pumpkin is quite cold

I have some holes on top anyhow...

 

[Magura]

I am not appropriate person to answer, because I have Alepx J modification by Zen - BablelFish - Comparing to him, Pumpkin is quite cold

I have some holes on top anyhow...

Ahem, could you not just measure the temp?


Magura

 

[spavleski]

@Magura - No problem. I can do that.
What temp. are You insterested in - where would you like to be measured?

 

[Magura]

Temp inside the box, temp of respective active devices.....

Wondering if you're walking the line, or there is still some headroom in such a layout without much ventilation.


Magura

 

[dviswa]

Hi Guys,

Now that my plitron "Over Kill trafo" has pretty much turned into "kill trafo", I need to find other sources for a transformer.

Has anybody successfully used the Apex Jr Mercury Magnetics TA110-W? Which other trafos have you guys been using?

Thanks,
Dinesh

 

[Zen Mod]

Hi Guys,

Now that my plitron "Over Kill trafo" has pretty much turned into "kill trafo", I need to find other sources for a transformer.

Has anybody successfully used the Apex Jr Mercury Magnetics TA110-W? Which other trafos have you guys been using?

Thanks,
Dinesh

why not - if you use two of them , to have twice 40Vac

you can always ask AR2 which one from Apex he use

 

[zettelsm]

Apex Jr TA110-W transformer

Hi Guys,

Now that my plitron "Over Kill trafo" has pretty much turned into "kill trafo", I need to find other sources for a transformer.

Has anybody successfully used the Apex Jr Mercury Magnetics TA110-W? Which other trafos have you guys been using?

Thanks,
Dinesh

I am going to use the MM TA110-Ws for my Pumpkin-Shunty AC power supply. Doing a quick hookup to check voltage, two MM TA110-Ws can be hooked up to supply a nominal 40V - 0 - 40V or 48V - 0 - 48V, the latter too much probably for all but the lowest of line voltages -- Japan perhaps @ 100VAC line.

The transformers appear to be good quality E-I core and should have no problem supplying the required current to a stereo pair of preamp-regulators. In typical DIY overkill fashion, I picked up 4 of the TA110-Ws so I can go dual-mono.

The price is certainly very right!

Steve Z