MS, Pultec, 1/2-BA283 boards support thread!

I have almost finished soldering all the parts for M / S +
BA283 + PCB front
how to connect everything?
Someone has done?
Thanks

I have almost finished soldering all the parts for M / S +
BA283 + PCB front
how to connect everything?
Someone has done?
Thanks

Click to expand...

What zobel values you used in ms boards? In this boards you need to cut impedance in half (2 secondaries per transformer), in this case I cant use Kit values if I use Carnhill.

Then rload (1 secondary) = 0.5* Rload.serie   .  The same for Rzobel.  And Czobel = 2*Czobel.serie

Seems Igor is busy and this proyect isnt good documented yet.. but you can look at schematics and find how to connect everything. I have mine 95% done , just need to solder this zobel values and maybe a modification in gain swith to 1dB/click instead 2db.

Igor can you give us some light on MS zobel (the values you send in kit for zobels are for xxx transformers??) and makeup gain modification switch ??

I dont understand why Igor posted splitted zobel values (1 networkd per winding) have great transient response compared to simple zobel network (1 network over series secondaries). Im missing something ?

Ilfungo, your mailbox for private msh is full.

sorry dan
now my mailbox is empty...

Ciao Dan
Igor says me:

"for 31267 or Carnhill substitute, see bom"
I think that  in Bom's values are correct...
how do you modify the gain switch from 2db to 1 db?
Thanks!!!

???

Yeah,

serious bummer

THERE IS NO INFO ON THIS PROJECT.

Got my Pcbs in march. Still unfinished. have no idea how to connect gain make up switch. Values etc?????? No idea about which parts are needed on the makeup pcb.  No idea about the transformers and the zobel whatever. And a whole bunch of other stuff.

Really reminded me of how stupid I am. Humiliating.

No answers to my questions.

Feel like I'm speaking into a blackhole.

Is there anything on the oooooootherrrrrrrrrr ssssssssssideeeeeeee?

No answer

Michael

hi Michael
Luckily this is called  : "High Quality diy projects" .........

good luck !

muffy1975 said:

Yeah,

serious bummer

THERE IS NO INFO ON THIS PROJECT.

Got my Pcbs in march. Still unfinished. have no idea how to connect gain make up switch. Values etc?????? No idea about which parts are needed on the makeup pcb.  No idea about the transformers and the zobel whatever. And a whole bunch of other stuff.

Really reminded me of how stupid I am. Humiliating.

No answers to my questions.

Feel like I'm speaking into a blackhole.

Is there anything on the oooooootherrrrrrrrrr ssssssssssideeeeeeee?

No answer

Michael

Click to expand...

Some other info from Igor:
Make up gain switch

and this....

So far this is not a SUPPORT THREAD but maybe just a 'thread'.

Has anyone finished one of these?

Is this another Helios............

Anyway, it's easy to sound troubled/upset. I'm not. Just got a bunch of half stuffed pcbs in my shed and no eq.

hello I think Igor is very busy at this time ...
He told me that soon will post all the information

how to connect inputs TRAFO (VTB carnhill 9046) to M/S?
M / S board go directly to TRAFO pin?
How?
On M / S board where I connect "TO CH1 - TO CH 2 "?
Thanks

IGOR, PLEASE HELP.

the recommended inductor VTB9054 does not fit the pcb. even the values are not what the PCB asks for.

How on earth do I connect this up to the PCB?

michael ???

Hi guys ...
someone can tell me if  the primary inputs transformer must be
series?
I finished everything and the only problem I have is a slight cut on the high
Muffy Hello I'm sorry but I can not help you with inductor (I used  Igor inductors)

thanks

Hello everyone
my Pultec / neve is alive and sounds wonderful!!!!!!!!
for what little I can if you need some information .....
ciao ;D

well done for finishing. :

I think Igor Must have made a mistake by suggesting this carnhill inductor. :'(

Where is Igor? He has not answered on this thread since almost the begining.  :-\

Where can I by the correct inductor?

Michael

Ilfungo,

what are the inductor values on your IGOR inductor?

there is either a mistake with the schematic or the PCB legend that says use this particular Carnhill inductor 9054.

the values of the Carnhill do not match the schematic ya see. ;D

michael

Hello Muffy1975
unfortunately I don't know the inductor values because ​​were
in the Igor Kit....

Hi Ilfungo,
How did you know what pcb orientation for the inductors in the kit?

Also, what did you use for R1 on the pultec front pcbs?

Miguel