On 3/2/22 6:00 AM, paul swed wrote:
As Ed stated Switchers feeding switchers can be problematic. What I found I
had to do was put a relay in series with a slight time delay. This allows
the primary switcher to come up and then gets slammed into the secondary
SPS. Could be a fet/transistor
Yes, from what I can tell, that is a completely different and unrelated
PSU. Mine has no rectifiers of any kind, so it definitely can't run from
AC. All the large TO packages on the primary side are IRFP250 MOSFETs. I
actually found in my stash of stuff a 2A rated 32V PSU, and since it was
; Sent: Wednesday, March 02, 2022 16:39
> To: time-nuts@lists.febo.com
> Subject: [time-nuts] Re: HP z3816a DC power supply DIP switches
>
> Sam, I noticed in your last post that you're planning to use a printer type
> PS. It may work if you luck out, but I suspect that it won't have en
of the Z3815A/GPSR units
appeared on the surplus market down this way)
DaveB, NZ
-Original Message-
From: ed breya [mailto:e...@telight.com]
Sent: Wednesday, March 02, 2022 16:39
To: time-nuts@lists.febo.com
Subject: [time-nuts] Re: HP z3816a DC power supply DIP switches
Sam, I noticed
Yeah, I actually figured the current rating of the printer PSU was going to
be an issue, (Rated at 625mA), but shockingly it seemed to not care much
about 1.1 amps being drawn from it. I was using a linear PSU before but
unfortunately the 25 amp rated one I have only goes up to 16 volts, not
Sam, I noticed in your last post that you're planning to use a printer
type PS. It may work if you luck out, but I suspect that it won't have
enough juice to get things up and running.
If it's anything like the typical ones I've seen, it's a small SMPS
brick, built for running ink-jet
That's quite a bit different from the PS in the Z3801A.
From the pictures, I'd guess that the "A" and "B" markings on the DIP
switch are for 24 or 48 V AC or DC Battery operation. I did a little
looking around, and found this:
http://www.realhamradio.com/GPS_Z3816A_Receiver.htm
It says that
Hi, thanks for the info. I'll definitely check out the RS-422 thing, I was
suspicious that might be the case. I think I'll probably try the thing on
24V and see if it's willing to start. The power adapter I plan to use for
it is one from a printer that puts out 31V, so it would probably work
spbach1...@gmail.com said:
> Here are some pictures of the PSU and power connector area, if anyone has any
> insight into what voltage this thing is expecting. What's confusing to me is
> that the original marking, 20-72 V was crossed out, 48V written over the top,
> and then the DIPs
spbach1...@gmail.com said:
> Also, does anyone have the manual?
There is a manual available for the Z3801A. The protocol is mostly the same.
We should start a collection if anybody finds differences.
--
These are my opinions. I hate spam.
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