NL8091 Board Trade?

[Mahdi Al Husseini]

Just finished testing a six-digit NL8091 clock (ESP32) PCB I designed and had manufactured, and it works great! As you can tell from the photos however, I require another NL8091. Anyone with an NL8091 interested in trading one for the PCB shown, fully assembled ($250.00 value in board manufacturing costs + parts)? I am also willing to sell the shown board for $250.00 + shipping costs, but I only have four remaining, and folks trading tubes have priority. Note: this boards uses shift registers - see schematic below. Thanks!

[Dieter Waechter]

Hi,

Did you use Millmax pin receptacles?

--> If yes, this can cause cracks in the frit of the 8091s. These always should be sit in flexible pin receptacles. The millmaxes give too little space for the pin circle tolearances.

Dieter

 

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[Mahdi Al Husseini]

Hi, Dieter,

Thanks for the note! While not millmax, they are quite similar, and to my knowledge, they are not flexible. Can you point me to flexible receptacles on the web? I am having a hard time finding what you might be referring to, and cracks are very much something I would like to avoid.

Mahdi

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[Dieter Waechter]

Hi,
Except for some special ones I always recommend these:
http://www.nocrotec.com/shop/product_info.php/language/en/info/p39_14-Nixie-Roehren-Fassungsbuchsen---vollvergoldet-.html
Especially for chinese tubes and for Russian tube (except IN-18) these or
equual should be used, but also National Electronics an Burroughs with
larger bases showed high divergence from the ideal pinout in many cases.
Best regads

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