On 9/16/2010 5:58 PM, Murray Greenman wrote:
> I know this is a bit off-topic, but I wonder if any of you guys have
> available the manual for the old (1970s) Drake DSR-2 receiver?
>
> I've you are able to send me a PDF copy, I'd be most grateful.
>
> 73,
> Murray ZL1BPU
>
>
I'd also post this on
I know this is a bit off-topic, but I wonder if any of you guys have
available the manual for the old (1970s) Drake DSR-2 receiver?
I've you are able to send me a PDF copy, I'd be most grateful.
73,
Murray ZL1BPU
___
time-nuts mailing list -- time-nuts
Hi
Rb's die if you let them get to warm. If it's in a plugin sized enclosure count
on a pretty good fan.
Bob
On Sep 16, 2010, at 3:57 PM, d.sei...@comcast.net wrote:
>
>
> Hi Bob-
>
>
>
> I don't have the LPRO in a plugin, but I had considered it, and was wondering
> if any of those t
Nice to know I'm not the only one who has had this idea.
My thinking was to use a laptop supply plugged into a socket on the
back of the TM5006 and route volts down a pair on the back-plane to
modules that need continuous power. Drive the GPSDO and ovens on the
modules that have them.
And use a co
It seems like it would be very tight in a single plug-in, if it even fits. A
dual PI would certainly work though.
Also, as someone pointed out, the TM-500 series may not have the power and
cooling available. I have. TM-5006 chassis that would certainly do the job in
both regards, but that's th
Hi Bob-
I don't have the LPRO in a plugin, but I had considered it, and was wondering
if any of those that had built one had thermal and/or lock issues.
Re the sun in our valley... not this year! My tomatoes just started really
producing and my squash and zucchini still haven't even fl
If you find a good source for the prototype kits, by all means, let me
know. I've been gutting cheap/dead modules for the enclosures. A
project I've been considering is putting a T'bolt into one just to
send 1pps and 10mhz down the backplane.
BTW, there is a yahoo group for TM500/5000 series gear.
Aha! Once again, Google is your friend --
http://www.slack.com/images/TE/EfratomPTB-100.jpg
shows the Efratom Rubidium module, and it's a double-width unit. That gives
plenty of room to mount the module horizontally, and plenty of room above and
below for fins and fans.
When I get my time m
I assume you mean Tektronix TM5xx or 5xxx modules.
I haven't seen an LPRO plugin, but considered doing one for my TM506 rack. My
conclusion was that I couldn't get rid of enough heat without cutting custom
fins for the LPRO.
Recall that the physics package in the LPRO is the biggest source of
Hi
First thing would be a touch test on the heat sink. It should be warm, but not
to hot to touch. Heat sink down should be hotter than vertical. That assumes
there's no moving air.
Next, start watching the VCXO voltage. Normal readings are around 5 to 7 volts.
I'd bet you are running closer t
d.seiter-"...Both then and now, it takes about 45 seconds to lock from cold,
and will stay locked for about 45 minutes"
++
I'm surprised that it locks in 45 seconds, I would expect it to take about 3-4
minutes. All the units I have lock in 3-5 minutes if t
Hi,
there are two obvious causes of lost lock,
wandering off beyond the range of the voltage controlled crystal
local oscillator, not an OXCO, which is swept through the atomic
response frequency,
and the failure of the rubidium lamp at the end of its life.
The oscillator sweeping voltage (pi
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