MOTM

Have you ever read somthing somewhere and looked through every applicable 
resource 3 or 4 times and it appears to just have vanished from the face of 
the earth?  I remember reading that the VCF and Triple Band Pass Filter need 
the purchase of some kind of heat dissipating compound I believe.  But I have 
read and scanned mutliple times the FAQ pdf, Catalog pdf, Tutorial and every 
other related document, but I can't find that info anymore.  Someone please 
tell me where I read about this so I can get on with saying "duh" to myself 
and wallow in my own self hatred. Thanks.

-Elhardt

That would be the MOTM-300 VCO and the MOTM-420 VCF so far.  Both have
Tempco resistors that mount on top of transistors.  Good heat coupling
between the transistors and Tempco resistor is required for proper
operation.  That's where the heat sink compound goes.  There is nothing
like that in the MOTM-410.  I think the only place you will find that
documentation is actually in the 300 and 420 construction instructions.

Larry (trying to quickly stop wallowing while Paul is messin' with his amp)
Hendry


> From: Elhardt@...
> 
> Have you ever read somthing somewhere and looked through every applicable

> resource 3 or 4 times and it appears to just have vanished from the face
of 
> the earth?  I remember reading that the VCF and Triple Band Pass Filter
need 
> the purchase of some kind of heat dissipating compound I believe.  But I
have 
> read and scanned mutliple times the FAQ pdf, Catalog pdf, Tutorial and
every 
> other related document, but I can't find that info anymore.  Someone
please 
> tell me where I read about this so I can get on with saying "duh" to
myself 

> and wallow in my own self hatred. Thanks.
> 
> -Elhardt

you're talking about heat sink compound, a white goopy stuff that helps 
dissipate the heat of components that get hot. i know it's needed for the 
300 VCO, not for the 410, perhaps for others . mouser part #524-8109-S  $6.50

mark


 >
 >
 >Message: 13
 >   Date: Sat, 23 Oct 1999 02:56:09 EDT
 >   From: Elhardt@...
 >Subject: Having another one of my spells
 >
 >
 >Have you ever read somthing somewhere and looked through every applicable
 >resource 3 or 4 times and it appears to just have vanished from the face of
 >the earth?  I remember reading that the VCF and Triple Band Pass Filter need
 >the purchase of some kind of heat dissipating compound I believe.  But I 
have

 >read and scanned mutliple times the FAQ pdf, Catalog pdf, Tutorial and every
 >other related document, but I can't find that info anymore.  Someone please
 >tell me where I read about this so I can get on with saying "duh" to myself
 >and wallow in my own self hatred. Thanks.
 >
 >
 >-Elhardt

In a message dated 10/23/99 9:23:17 AM, n0nspaz@... writes:

>you're talking about heat sink compound, a white goopy stuff that helps
>dissipate the heat of components that get hot. i know it's needed for the
>300 VCO, not for the 410, perhaps for others . mouser part #524-8109-S
> $6.50

As Larry said, it's also used on the 420 and I think it'll be needed for the 
320 VCLFO if I'm not mistaken. If you get a tube of it, I suggest storing it 
with the cap down since i tried storing it with the cap up and found that 
after a few months it separated a bit, such that most of the goop went to the 
bottom of the tube but a very small amount of a very slippery film went to 
the top -- just about enough to cover the top of a tranny pair so when the 
goop comes out it immediately slides off sticking to everything but the 
tranny pair.

JB

> From: JWBarlow@...
>  If you get a tube of it, I suggest storing it 
> with the cap down since i tried storing it with
> the cap up and found that after a few months
> it separated a bit, such that most of the goop
> went to the bottom of the tube but a very small
> amount of a very slippery film went to the top --
> just about enough to cover the top of a tranny pair
> so when the goop comes out it immediately slides
> off sticking to everything but the tranny pair.

Yep, that stuff does tend to separate.  No more than we use on MOTM, you
could get by with one of the small tubes they sell at rat shack.  It ain't
big enough to hang around and get old.  Since I don't care to torture
myself as John does, I usually squeeze my tube out onto a paper plate or
something until the right mix starts coming out.  Then I put it on the
part.  If I REALLY want to make myself extra work on my MOTM modules, I
just put some of the chips in backwards like I did on my 410.

Stooge Larry

Thanks for the info about the heat sink compound.  It sounds like the 
same/similar stuff that is used on regulator ICs.  I guess I was wondering 
where I read about it in the MOTM info.  It couldn't have been the 
construction instructions as one suggested, because I don't have those.  But 
as long as I know what it is now, that's good enough.

-Elhardt

The need for "not supplied" heat sink compound  is also mentioned in bold
print at the top of certain pages in the downloadable FAQ.

		-----Original Message-----
		I guess I was wondering 
		where I read about it in the MOTM info.  It couldn't have
been the 
		construction instructions as one suggested, because I don't
have those.

>>"Tkacs, Ken" writes:
 The need for "not supplied" heat sink compound  is also mentioned in bold
 print at the top of certain pages in the downloadable FAQ.<<

Thanks for the info, but you made me read through the FAQ for about the fifth 
damn time only to find that there is NO bold print (or any print at all) 
about the Heat Sink compound.  There IS the mention of "optional" Heat Shrink 
tubing.  Maybe you confused it with that.  Since nobody else was able to 
state the document and page number, I am assuming that possilbe website 
changes caused that info to disappear.

Did I say 'FAQ'? Oops. I meant the *catalog,* right under it.

Check the page for the VCO, the third line on the page (part of the
headline): "NOTE: This kit will require a small amount of heat sink compound
(not supplied)." That's repeated on the next page (the 420 filter).

		-----Original Message-----
		Thanks for the info, but you made me read through the FAQ
for about the fifth 
		damn time only to find that there is NO bold print (or any
print at all) 
		about the Heat Sink compound

Ken.Tkacs@... writes:
>>Check the page for the VCO, the third line on the page (part of the
 headline): "NOTE: This kit will require a small amount of heat sink compound
 (not supplied)." That's repeated on the next page (the 420 filter).<<

Mistery finally solved.  I knew I read it somewhere.  Thanks.

The other Ken (-Elhardt)