Hewlett-Packard ran tests, and found that the flux left on the board
protected the board from corrosion.
Some vintage HP boards are actually coated with flux (Boards from the late
nixie-early IC era)
On Monday, December 15, 2014 8:51:01 PM UTC-8, westdave wrote:
>
> I have a IN-18 clock in a alu
Change C4 from 1uF/250V to 4.7uF/250V.
Apparently when the displays go from lit to dark, there is a little spike
on the 180V supply.
Increasing the size of the cap dampens this and stops the crashing. Two of
the three I built
were afflicted with the problem in three of the 4 display modes. They
Ha ha ha, boy they weren't kidding, IN-14s suck pretty hard (I built a
clock with them (n/t)
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FWIW the clock kit I bought from www.pvelectronics.co.uk was great, with
the sole exception that the caps in the crystal oscillator circuit ware
crazy large. 33pf? more like 6pF is the right value. My clock lost 2
minutes a day until I corrected that flaw, but the rest of the clock design
is re
Source located for the tubes, and thanks to the group member who supplied
them!
On Thursday, September 4, 2014 8:49:50 PM UTC-7, michael ohara wrote:
>
>
> I thought I had 12 IN-16s when I ordered this clock board, but I can't
> find the silly things.
>
> I do have a B797
I thought I had 12 IN-16s when I ordered this clock board, but I can't find
the silly things.
I do have a B7971 to trade and a ton of IN-14 tubes which I'd trade 3:1 for
new or used tubes in good condition with spacers of the same color.
Thanks
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Thanks, I found the documentation after all :)
On Thursday, August 21, 2014 10:34:44 AM UTC-7, Michail wrote:
>
> Responding directly.
>
> Michail
>
> In a message dated 8/21/2014 8:08:41 A.M. Pacific Daylight Time,
> zebra...@gmail.com writes:
>
> I found an old FW-4 board but I don't ha
Found a copy of the documentation on an old laptop - woot
On Thursday, August 21, 2014 8:08:35 AM UTC-7, michael ohara wrote:
>
> I found an old FW-4 board but I don't have the instructions for it (which
> switch does what, what kind of wall wart does it need?)
> Does anyone he
I found an old FW-4 board but I don't have the instructions for it (which
switch does what, what kind of wall wart does it need?)
Does anyone here have a copy of those files? I tried emailing pete hand at
the last address I had but haven't heard back.
Many thanks for your assistance.
(I bought s
