Mellotronists

My MK VI #019 was assembled over four years ago.  Markus Resch has 
made a number of improvements to the preamplifier.  I recently 
shipped my preamp to Stockholm for upgrades.
 
The preamp design was improved several years ago, to better match the 
low impedance heads.  In addition to other innovative design changes, 
the tone control was changed to provide a larger adjustment range.

MK VI #019 was down for about a week, while the preamp was on holiday 
in Stockholm.  I wired up the preamp yesterday.

Did I notice much of an improvement?  Yes.  The new preamp 
arrangement is very quiet.  The old preamp was relatively quiet, but 
this new design is quiet even at wide open gain.  (My amp goes to 
eleven!!!)    Markus has worked hard to minimize the noise level of 
this new preamp version.

Clay Eccles
MK VI #019

--- In Mellotronists@yahoogroups.com, "ceccles_ca" <clay123@r...> 
wrote:
> My MK VI #019 was assembled over four years ago.  Markus Resch has 
> made a number of improvements to the preamplifier.  I recently 
> shipped my preamp to Stockholm for upgrades.
>  
> The preamp design was improved several years ago, to better match 
the 
> low impedance heads.  In addition to other innovative design 
changes, 
> the tone control was changed to provide a larger adjustment range.
> 
> MK VI #019 was down for about a week, while the preamp was on 
holiday 
> in Stockholm.  I wired up the preamp yesterday.
> 
> Did I notice much of an improvement?  Yes.  The new preamp 
> arrangement is very quiet.  The old preamp was relatively quiet, 
but 
> this new design is quiet even at wide open gain.  (My amp goes to 
> eleven!!!)    Markus has worked hard to minimize the noise level of 
> this new preamp version.
> 
> Clay Eccles
> MK VI #019


P.S.
I forgot to mention the new swell pedal jack on the preamp.
The jack on the back of the MK VI preamp is a T-R-S balanced output.
 
There is a new jack on the front. It is intended for a T-R-S swell 
pedal. That means that you can connect a swell pedal (for keyboards, 
10kOhm) to this jack with only one cord. 

The balancing of the "rear" output and its 600 ohm output impedance 
stays unaffected by the volume pedal.  <-- (I'm not sure what the 
sonic benefit is, but it must be a good thing... right?)

I found a keyboard swell pedal in an Antique shop yesterday.  It has 
a single T-R-S plug on it, and a $9 price tag.  No surprise that it's
wired to the MK-VI now.  It works... and sounds great.  The noise 
level is extremely low.

Clay Eccles
MK VI #019