Ry

Re: DB54 - Creating of 2254 style compressor {update 12.10.18}
« Reply #180 on: February 21, 2019, 08:02:24 AM »
Hi All,

At first this is a great project the boards are great. Thanks for that.
There is only one thing I see in the bom at the resister value. On 1k2 and 1k8 is both BA283R19 written which is the correct one?

Thanks for the info.


Re: DB54 - Creating of 2254 style compressor {update 12.10.18}
« Reply #181 on: February 21, 2019, 06:25:37 PM »
1K8 - correct value

Re: DB54 - 2254 style compressor {update 22.10.19}
« Reply #182 on: October 22, 2019, 10:34:27 AM »
Hi!
We are preparing for 4th pre-order kits of DB54!

More information here:
https://www.diystudiotoys.com

Undos

Re: DB54 - 2254 style compressor {update 22.10.19}
« Reply #183 on: November 10, 2019, 12:32:52 PM »
Hi
First this is a very nice project and I want to thank Igor for a  great kit and you guys for the helpful comments in the forum. Finally I have 2 perfectly sounding and working units.
 
This might be helpful for others with REV 1.0 boards =>

One thing I noticed is when I turned on the COMPRESS switch, the polarity of the signal flipped at the output. In BYPASS mode the polarity didn’t flip. Igor did help me sort it out (see also the original 2254 schematic online). Actually the TRX OUT numbers 5+8 are interchanged on the pcb rev 1.0 at least on my pcb's.  To fix it => Just flip wires on output pins of the output transformer and the polarity should be correct afterwards. So PIN 5 of output trx should go to  TRX OUT 8 on pcb2 and PIN8 of 1166 trx should go to TRX OUT 5 on pcb 2.
Hope that makes sense and please correct me if I’m wrong.

Other thoughts:
- I used Sowter 1717 (Lead version) as output transformer for my unit and it fits perfectly in the 1U case. (See picture)
- Units work perfect with my external Five Fish PSU
- The jumper is for output termination. With the jumper in place the 620 ohm resistor is active and without the jumper 620 ohm resistor is not used.
The compressor sounds awesome and the additional attack and release times are great.
I can recommend this project.
Happy building

tim

Re: DB54 - 2254 style compressor {update 22.10.19}
« Reply #184 on: November 10, 2019, 12:37:12 PM »
Hi
First this is a very nice project and I want to thank Igor for a  great kit and you guys for the helpful comments in the forum. Finally I have 2 perfectly sounding and working units.
 
This might be helpful for others with REV 1.0 boards =>

One thing I noticed is when I turned on the COMPRESS switch, the polarity of the signal flipped at the output. In BYPASS mode the polarity didn’t flip. Igor did help me sort it out (see also the original 2254 schematic online). Actually the TRX OUT numbers 5+8 are interchanged on the pcb rev 1.0 at least on my pcb's.  To fix it => Just flip wires on output pins of the output transformer and the polarity should be correct afterwards. So PIN 5 of output trx should go to  TRX OUT 8 on pcb2 and PIN8 of 1166 trx should go to TRX OUT 5 on pcb 2.
Hope that makes sense and please correct me if I’m wrong.

Other thoughts:
- I used Sowter 1717 (Lead version) as output transformer for my unit and it fits perfectly in the 1U case. (See picture)
- Units work perfect with my external Five Fish PSU
- The jumper is for output termination. With the jumper in place the 620 ohm resistor is active and without the jumper 620 ohm resistor is not used.
The compressor sounds awesome and the additional attack and release times are great.
I can recommend this project.
Happy building

tim

My double congrats! :)


 

Related Topics

  Subject / Started by Replies Last post
7 Replies
3132 Views
Last post May 17, 2008, 01:03:24 PM
by Gus
233 Replies
50016 Views
Last post September 13, 2012, 11:13:28 AM
by Igor
67 Replies
12693 Views
Last post October 05, 2011, 06:07:49 PM
by mulletchuck
11 Replies
5957 Views
Last post January 19, 2019, 03:16:56 AM
by Greebok