Spencerleehorton

Re: Making Neve Style Input Transformer for 1073/1290 preamp
« Reply #60 on: October 18, 2016, 08:08:13 PM »
right ive changed gnd connections to correct and all working really good, no hum, big sound!!!! and i mean BIG SOUND!!!!
now to build some more!!!!
thanks everyone for your help.

regards

Spence.
website: www.mohawkstudios.co.uk
email: [email protected]

If it hisses its probably the wrong impedance!!!
Or a snake!!!


Gene Pink

Re: Making Neve Style Input Transformer for 1073/1290 preamp
« Reply #61 on: October 19, 2016, 12:46:57 AM »
the only way i can think of off hand is using 4 relays to reverse the transformer? is there a easier way?
If you are just going to use a toggle switch to change input configurations, they make 4PDT toggle switches. No relay necessary.

Wire per PRR's carefully drafted schematic.

Gene

gyraf

Re: Making Neve Style Input Transformer for 1073/1290 preamp
« Reply #62 on: October 19, 2016, 02:57:56 AM »
..Lorlin4x3 will do, stopped at 4x2..

(yes, I like rotaries..)

Jakob E.
..note to self: don't let Harman run your company..

Spencerleehorton

Re: Making Neve Style Input Transformer for 1073/1290 preamp
« Reply #63 on: October 19, 2016, 04:32:21 AM »
Could you do a scribble Jacob please?
website: www.mohawkstudios.co.uk
email: [email protected]

If it hisses its probably the wrong impedance!!!
Or a snake!!!

gyraf

Re: Making Neve Style Input Transformer for 1073/1290 preamp
« Reply #64 on: October 19, 2016, 05:08:25 AM »
Could you do a scribble Jacob please?

Something like this, maybe?

If you want it, you could use the last (3rd) switch step for pass-through for reference, by connecting Lorlin pins 3to9 and 6to12?

Jakob E.
« Last Edit: October 19, 2016, 05:11:44 AM by gyraf »
..note to self: don't let Harman run your company..

Spencerleehorton

Re: Making Neve Style Input Transformer for 1073/1290 preamp
« Reply #65 on: October 19, 2016, 05:34:24 AM »
I wish we had the like button back!!!

Thank you Jacob, I will implement this as I have a few lorlins.

Regards

Spence.
website: www.mohawkstudios.co.uk
email: [email protected]

If it hisses its probably the wrong impedance!!!
Or a snake!!!

Spencerleehorton

Re: Making Neve Style Input Transformer for 1073/1290 preamp
« Reply #66 on: May 13, 2018, 07:13:56 AM »
It’s been a while but finally made some progress and have a test version which works really well made from a tin can! Tomato soup actually!!!
Just need to do a tidy version of it now it works well.
website: www.mohawkstudios.co.uk
email: [email protected]

If it hisses its probably the wrong impedance!!!
Or a snake!!!

Spencerleehorton

Re: Making Neve Style Input Transformer for 1073/1290 preamp
« Reply #67 on: June 01, 2018, 09:45:01 AM »
lastest test box, have made 4 part box as per original, just need mumetal to arrive then i can pot transformers and then test.
website: www.mohawkstudios.co.uk
email: [email protected]

If it hisses its probably the wrong impedance!!!
Or a snake!!!

Oversea

Re: Making Neve Style Input Transformer for 1073/1290 preamp
« Reply #68 on: May 17, 2020, 05:45:33 PM »
lastest test box, have made 4 part box as per original, just need mumetal to arrive then i can pot transformers and then test.


Hi Spencerleehorton,

A while since your last update on this interesting project. Just curious to know what the end result was and your finding around it building one of these? How did it sound in comparison  to other tranformers, such as carnhill/cinemag?

Very interesting read! :)

Regards
J



Spencerleehorton

Re: Making Neve Style Input Transformer for 1073/1290 preamp
« Reply #69 on: May 18, 2020, 01:37:42 AM »
The 10468 clones I make sound very good, as good if not better than sowters, much better than the chameleon labs
website: www.mohawkstudios.co.uk
email: [email protected]

If it hisses its probably the wrong impedance!!!
Or a snake!!!


Oversea

Re: Making Neve Style Input Transformer for 1073/1290 preamp
« Reply #70 on: May 18, 2020, 12:40:47 PM »
The 10468 clones I make sound very good, as good if not better than sowters, much better than the chameleon labs

So you have tested the chameleon labs ones then?  I understod from their videos that they put alot of effort in developing the transformers. Not sure how it compares with an original marinair one tho. Would be cool to find one or two to compare with also.

Anyway, i am curious to build something similar myself for the four  1073 rack i am aiming at. I figured i’d buy some carnhill/sowter and the. do my own to compare with.

Are you willing to share your findings (your formula/basic info), or is it a bit of a trade secret?  :) (Iunderstand if it is, if you happened to sell them or something?)

Anyway, very interesting stuff!

// J

Spencerleehorton

Re: Making Neve Style Input Transformer for 1073/1290 preamp
« Reply #71 on: May 18, 2020, 04:06:01 PM »
yeah i'm reluctant to share years of tinkering but i'm hopefully getting a real 10468 at some point for repair, so once sorted i can compare mine to it.
website: www.mohawkstudios.co.uk
email: [email protected]

If it hisses its probably the wrong impedance!!!
Or a snake!!!