Re: Where's Wald-ohm


"The VG&L Railroad" <meo@xxxxxxx> wrote in message
news:pan.2005.08.19.05.05.49.510334@xxxxxxxxxx
> mondrian, tied to the tracks, said:
> ...
>> Last night I got some Mallory and Sprague (electrolytic) caps in the
>> mail from Kendrick amplifiers (easier to find the right part than
>> searching a giant electronics website, quick in the mail, too) and
>> disassembled the amp, then installed the rest of the caps as suggested
>> here.
>
> How are his prices?
> ...
>> All without frying myself or the amp, which is amazing to me.
>
> When I was a kid, half my friends were used to digging
> into *something* - electronics, car engines, electric
> motors, the plumbing, whatever. Today we scare kids off
> from such things. I think that's a really bad idea.
> Glad you found out you *can* affect the real world without
> destroying something!
>
>> Only one possible problem: the electrolytic that was on the first input
>> was originally 20uF, and I guess I accidentally ordered a 2uf, which I
>> wired in anyway in its place, figuring it couldn't cause too much harm.
>
> Correctamundo.
>
>> It sounds okay; made the amp cleaner on that input further up the dial,
>> and seems about twice as loud as input 2. Input 2 is also a little more
>> mellow.
>
> A smaller cap will reduce gain, meaning lower volume but
> stays clean longer. Why th other channel sounds different
> depends on the circuit and components. I usually go for
> different sounds between channels. Does channel two have a
> bypass cap at all?
>
> ...
>> Also, the speaker cloth resonates furiously on a low F#, and some other
>> frequencies. Think I could change the grille cloth to something more
>> sonically transparent without being labeled a "butcher"?
>
> Too late.
>
> 8^)
>
> You can try dampening the grill cloth then using a hair
> dryer on it to tighten it up. Just do it all
> evenly, so it tightens up evenly!
>
>> I've already modded the caps, but that's probably still OK considering
>> a Gibson -du-jour may exist out there somewhere with these values in it
>> :-P
>
> Roger that.

Very nice. Thanks for letting us know how it worked out. You might decide
you want to use a 20 instead of the 2 cap. You can use a 20 or a 22, both
commonly available. Make sure it's rated for the right voltage. See if you
can get your vendor to go easy on the postage. You aren't the first to
learn this expensive mistake. A while back, I placed a parts order and left
out two or three real small things. I had to pay $8 for $4 worth of parts,
but I needed 'em. After you do this for a while, you get to stockpile
stuff. Unfortunately electrolytic caps have a relatively short shelf life,
so you don't want to buy extras.

Regards,
Phil


.

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