SEN / CEN All JFET IV Converter Evaluation Pack

[samoloko]

Maybe Jan will kindly consider selling you a reprint of just that article at a reasonable price.

I know Jan does not make any money in publishing the LA.
He does it only for love, and we are the ones who benefit.


Patrick

very good

or there may be an option to download the issue as a pdf at discounted price

 

[EUVL]

You have to ask him.
Was just an idea.


Patrick

 

[stoolpigeon]

Hi,

can it work with TDA1541A?

thanks, sp

 

[EUVL]

There are solutions discussed already for both current and voltage offsets, so in theory yes.
But you need to ask those familiar with that particular DAC chip.


Patrick

 

[EUVL]

GB will close this weekend.

This will be one batch small volume only.
So if you wish to have more than one set, you should consider subscribing now.

See list in post#58.

Price for the Vref special PCBs will be confirmed later.


Patrick

 

[guglielmope]

Subscribing for PCB with Vref access (to be confirmed and costs extra):

Name:
qusp
NicMac
prooptiki
mravinsky
necplusultra
AlanElsdon
Nikon1975
heinz1
Murdoc
Guglielmope

 

[vitalica]

Subscribing for PCB with Vref access (to be confirmed and costs extra):

Name:
qusp
NicMac
prooptiki
mravinsky
necplusultra
AlanElsdon
Nikon1975
heinz1
Murdoc
Guglielmope
vitalica

 

[vitalica]

necplusultra__1 Kit__2 matched pairs__60€
Murdoc__1 Kit__2 matched pairs__60€
maravedis__1 Kit__2 matched pairs__60€
Nikon1975__1 Kit__2 matched pairs__60€
pchw__1 Kit__2 matched pairs__60€
ernesternest__1 Kit__2 matched pairs__60€
heinz1__1 Kit__2 matched pairs__60€
vitalica__2 Kit__4 matched pairs__120€
mravinsky__1 Kit__2 matched pairs__60€
samoloko__1 kit__2 matched pairs__60 euro
BDL__1 Kit__2 matched pairs__60€
ujamerstand__1 Kit__0 matched pairs__50€
ystkkmkr__1 Kit__2 matched pairs__60€
prooptiki__1 Kit__0 matched pairs__50€
NicMac__1 Kit__2 matched pairs__60€
qusp__1 kit__0 matched pairs__50€
AlanElsdon__1 kit__2 matched pairs__60€
Mick.Carrick__1 kit__0 matched pairs__50€
Holminator__1 Kit__2 matched pairs__60€
Joseph0__1 kit__2 matched pairs__60€
bohrok2610__1 kit__2 matched pairs__60€
Robert F_1kit_0 matched pairs_50€

 

[thorstenlarsen]

necplusultra__1 Kit__2 matched pairs__60€
Murdoc__1 Kit__2 matched pairs__60€
maravedis__1 Kit__2 matched pairs__60€
Nikon1975__1 Kit__2 matched pairs__60€
pchw__1 Kit__2 matched pairs__60€
ernesternest__1 Kit__2 matched pairs__60€
heinz1__1 Kit__2 matched pairs__60€
vitalica__2 Kit__4 matched pairs__120€
mravinsky__1 Kit__2 matched pairs__60€
samoloko__1 kit__2 matched pairs__60 euro
BDL__1 Kit__2 matched pairs__60€
ujamerstand__1 Kit__0 matched pairs__50€
ystkkmkr__1 Kit__2 matched pairs__60€
prooptiki__1 Kit__0 matched pairs__50€
NicMac__1 Kit__2 matched pairs__60€
qusp__1 kit__0 matched pairs__50€
AlanElsdon__1 kit__2 matched pairs__60€
Mick.Carrick__1 kit__0 matched pairs__50€
Holminator__1 Kit__2 matched pairs__60€
Joseph0__1 kit__2 matched pairs__60€
bohrok2610__1 kit__2 matched pairs__60€
Robert F_1kit_0 matched pairs_50€
thorstenlarsen_2 kit_2 matched pairs_120€

 

[CeeVee]

necplusultra__1 Kit__2 matched pairs__60€
Murdoc__1 Kit__2 matched pairs__60€
maravedis__1 Kit__2 matched pairs__60€
Nikon1975__1 Kit__2 matched pairs__60€
pchw__1 Kit__2 matched pairs__60€
ernesternest__1 Kit__2 matched pairs__60€
heinz1__1 Kit__2 matched pairs__60€
vitalica__2 Kit__4 matched pairs__120€
mravinsky__1 Kit__2 matched pairs__60€
samoloko__1 kit__2 matched pairs__60 euro
BDL__1 Kit__2 matched pairs__60€
ujamerstand__1 Kit__0 matched pairs__50€
ystkkmkr__1 Kit__2 matched pairs__60€
prooptiki__1 Kit__0 matched pairs__50€
NicMac__1 Kit__2 matched pairs__60€
qusp__1 kit__0 matched pairs__50€
AlanElsdon__1 kit__2 matched pairs__60€
Mick.Carrick__1 kit__0 matched pairs__50€
Holminator__1 Kit__2 matched pairs__60€
Joseph0__1 kit__2 matched pairs__60€
bohrok2610__1 kit__2 matched pairs__60€
Robert F_1kit_0 matched pairs_50€
thorstenlarsen_2 kit_2 matched pairs_120€
CeeVee__1 kit__2 matched pairs__60€

 

[EUVL]

Status today :

26 evaluation kits, of which 11 are the Vref version.
I shall find out about the setup charges for 2 new PCB types, then divide by 11.
On top of that I assume most will be using them for ES9018, and hence you need 2 extra type 0 heatsink (2.50€ each).

All 40 matched pairs of 2SJ74BLs have been accounted for.
GB closes on Sunday.


Patrick

 

[NicMac]

Patrick,
sounds great!
I understand that (additional) transistor matching is going to be critical for a good outcome with the Vref version for ES9018. To improve my knowledge and experience, I will be happy to do this for myself and other ES9018 owners - with your tutoring
Cheers,
Nic

 

[EUVL]

Only need Idss match. And it only affects DC offset at the input.
Not so critical here than elsewhere.


Patrick

 

[stoolpigeon]

Hi,

are you selling just the pcb?

thanks, sp

 

[EUVL]

No, because I consider the heatsink essential to maintain minimum DC drift.


Patrick

 

[Murdoc]

I will correct this list because i'm on the other one with Vref access. Thanks.

necplusultra__1 Kit__2 matched pairs__60€
maravedis__1 Kit__2 matched pairs__60€
Nikon1975__1 Kit__2 matched pairs__60€
pchw__1 Kit__2 matched pairs__60€
ernesternest__1 Kit__2 matched pairs__60€
heinz1__1 Kit__2 matched pairs__60€
vitalica__2 Kit__4 matched pairs__120€
mravinsky__1 Kit__2 matched pairs__60€
samoloko__1 kit__2 matched pairs__60 euro
BDL__1 Kit__2 matched pairs__60€
ujamerstand__1 Kit__0 matched pairs__50€
ystkkmkr__1 Kit__2 matched pairs__60€
prooptiki__1 Kit__0 matched pairs__50€
NicMac__1 Kit__2 matched pairs__60€
qusp__1 kit__0 matched pairs__50€
AlanElsdon__1 kit__2 matched pairs__60€
Mick.Carrick__1 kit__0 matched pairs__50€
Holminator__1 Kit__2 matched pairs__60€
Joseph0__1 kit__2 matched pairs__60€
bohrok2610__1 kit__2 matched pairs__60€
Robert F_1kit_0 matched pairs_50€
thorstenlarsen_2 kit_2 matched pairs_120€
CeeVee__1 kit__2 matched pairs__60€

 

[EUVL]

This is my understanding (including the Vref version).
Please kindly check and correct if necessary.


Patrick


necplusultra__1 Kit Vref__2 matched pairs__60€ + Setup charge
Murdoc__1 Kit Vref__2 matched pairs__60€ + Setup charge
maravedis__1 Kit__2 matched pairs__60€
Nikon1975__1 Kit Vref__2 matched pairs__60€ + Setup charge
pchw__1 Kit__2 matched pairs__60€
ernesternest__1 Kit__2 matched pairs__60€
heinz1__1 Kit Vref__2 matched pairs__60€ + Setup charge
vitalica__2 Kits Vref__4 matched pairs__120€ + Setup charge
mravinsky__1 Kit Vref__2 matched pairs__60€ + Setup charge
samoloko__1 kit__2 matched pairs__60 euro
BDL__1 Kit__2 matched pairs__60€
ujamerstand__1 Kit__0 matched pairs__50€
ystkkmkr__1 Kit__2 matched pairs__60€
prooptiki__1 Kit Vref__0 matched pairs__50€ + Setup charge
NicMac__1 Kit Vref__2 matched pairs__60€ + Setup charge
qusp__1 kit Vref__0 matched pairs__50€ + Setup charge
AlanElsdon__1 kit Vref__2 matched pairs__60€ + Setup charge
Mick.Carrick__1 kit__0 matched pairs__50€
Holminator__1 Kit__2 matched pairs__60€
Joseph0__1 kit__2 matched pairs__60€
bohrok2610__1 kit__2 matched pairs__60€
Robert F_1kit_0 matched pairs_50€
thorstenlarsen_2 kit_2 matched pairs_120€
CeeVee__1 kit__2 matched pairs__60€
Guglielmope__1 Kit Vref__0 matched pairs__50€ + Setup charge

.

 

[EUVL]

Total 15 sets standard, 12 sets Vref.
All 40 pairs JFET already accounted for.


Patrick

 

[EUVL]

Murdoc,

The issue in your PM has been addressed.


Patrick

 

[EUVL]

Stoolpigeon,

> are you selling just the pcb?

BTW, as Nikon1975 pointed out before, the circuit is so simple that you can easily do P2P.

If you think you do not need the heatsink (which I do not agree with), or you intend to use LSK389s instead, I suggest you breadboard the circuit for a quick listen first, before you decide how to build properly (P2P or otherwise).


Patrick

.