Russ White said:
I agree with Steen, board look very nice now.
Pour your chemicals and start etching!!!😀 😀 😀
Thanks Russ, excellent work😎
stop
wonderfull
gimme pdf if ya can
if not-it's ok 😉
yo,ppl-I'm too slow with this (time,again!) I need current per stage to think about supply!
😀
wonderfull
gimme pdf if ya can
if not-it's ok 😉
yo,ppl-I'm too slow with this (time,again!) I need current per stage to think about supply!
😀
I just finished looking through this thread and the NS-10 seems remotely similar to the ESS preamp to me. Any resemblence... does anyone else know? Its been a long time since I was inside an ESS preamp, about 1974 to be exact.... but it shure looks familiar to me.
Mark
Mark
Yep, let them PDF's come rollin'😀 😀 I have the psu's for testing made up allready. Its a Zener/emitter follower with a CCS (J511). The psu was developed in the psu department some time ago, by our friend Alcaid, with the help from other authorities.
Have a look🙂 (Cant help it Tony, I just love to watch them boards grow on my table😀 )
Russ, thanks a lot for all your work on this🙂 Lets hope it sounds as good as it looks😎
Steen.🙂
Attachments
And the componenet side mirrored.
Thanks to everyone. Let me know if there are any issues.
Cheers!
Russ
Thanks to everyone. Let me know if there are any issues.
Cheers!
Russ
If I had the transistors I would. 🙂 I have ordered them, but they are not here yet. 🙁
But very soon!
Cheers!
Russ
But very soon!
Cheers!
Russ
tmblack said:
Tom,
This is just a proto board for testing. Of course the design can be optimized if we where to produce it for something like a GB. But before that point we wanted to take a peek on different issues and have our own test dirve with it.
I know, from the other thread, you have your own iteration with a jfet as a gain device, could you share a shematic of that implementation?
I myself would be very intereste in having a look at it and testing the circuit. I have some hitachi's from an old project that would like to find a home such as an NS10.
😀 😀 😀
Mark A. Gulbrandsen said:
Mark,
No idea which was the ESS, that's the brand?
Could you share more information please?
🙂 🙂 🙂
Apassgear
my last iteration was back to NS10 original design with schematic already posted.
You can try JFET or even VMOS as Q1 but I think BJT is neutral sounding for me.
Tom
EE
my last iteration was back to NS10 original design with schematic already posted.
You can try JFET or even VMOS as Q1 but I think BJT is neutral sounding for me.
Tom
EE
I will try some different types out. As Tony, I also have a little supply of some of those Hitachi's.
I have some sk170 and also some of those rare sk369's🙂 I intend to try out some j110 also, along with the bjt's.
Steen🙂
steenoe said:
I guess biasing a jfet is different from a bjt that’s why I was asking Tom for some tips.
Yes, I guess so too. I have Borbely's writings on Jfets lying somewhere, and was thinking of taking them with me, when I hit the pillow😉 Maybe there is something usefull. In the meantime I second you Tony, asking Tmblack for advice on the matter.
Steen🙂
Why not use the 2SK30 ?
Russ,
thanks for changing and sharing your layout, the 4- and 5-pad cap seats look grand.
Russ,
thanks for changing and sharing your layout, the 4- and 5-pad cap seats look grand.
You are right Jacco. Thats what Lumanauw used, if memory serves me correct. Lets see if the supplier can dig up some of those. The darn thing about these old Toshiba and Hitachi devices is availability
What I dont understand is; if those devices are so good, why arent anyone making them😕 😕
Steen🙂
Ps. Russ, could wee see the latest schematic?
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