Hi Rick,
if you happen to be state-side, I imagine 120V fans are pretty common.
However, if you live somewhere where they 'don't do things by halves', low
voltage AC fans are hard to come by!
Any bling PC shop can supply a range of quiet DC fans, so it comes down to
practicalities.
Brushless
At 11:37 PM 2/10/2011, Rick Karlquist wrote...
It isn't clear why you need to change to 12V fans.
Why not modern 120V fans?
The PC market has driven the creation of quiet, low cost, 12V, 80mm
fans.
You can get a ball-bearing Pabst 8506N, which is comparable to the
original fan, 35 dba
This is ideed something to do with internal external reference. The switch
is in the wrong position or someone took the oven oscilator out and sold it
on epay for $150.
Simply switch to external and supply a 10 mc sig 1 volt. If it works find
out whats missing.
I would not use wd40 nor pull chips
With humor it was loud
Like the alternates
On Fri, Feb 11, 2011 at 9:16 AM, Mike S mi...@flatsurface.com wrote:
At 11:37 PM 2/10/2011, Rick Karlquist wrote...
It isn't clear why you need to change to 12V fans.
Why not modern 120V fans?
The PC market has driven the creation of quiet, low
nope the osc is there and the switch is correct. The strangest part other then
all the dead critters the spiders had for lunch and then they finally
died. is the
cover screws. all that is pretty much left are craters where the pozi-drive X
use to be. Nothing seems to be abused on the inside at
There was also a little board near the oven that could be missing. Its the
buffer switch bd.
But bottom line get a scope and find out why the reference is getting to
something.
On Fri, Feb 11, 2011 at 9:34 AM, Pete Lancashire p...@petelancashire.comwrote:
nope the osc is there and the switch is
I use an International Power IHBCC512 which is overkill but I had it
handy. I also use a cheap switcher on another one that serves as a
reference for a ham repeater. Based on my somewhat limited experience,
they are a long way from a Z3801. They are much cheaper though.
From: Tim Tuck t...@skybase.net
Subject: Re: [time-nuts] Thunderbolt Supply
Hi Larry,
I use a linear supply for mine.
My supply is actually a headphone amp supply kit from JayCar
Electronics
here in Australia. Its basically two LM317's and a 7805 for 5v. I
changed the resistor that set the
Hello The Net:
Consider the HP-6235A triple power supply for a single T'Bolt.
Consider a HP-6236B triple power supply.
0-6V to 2.5A
0 to +/-20V at 0.5A
Can drive 2 each T'Bolts, but not optimally at a cold start.
After the high cold start current draw, the +12V draw goes down nicely
and then
Paul is right! NO WD40, wrong stuff!!
The chips can be reseated by GENTLY twisting the baords and pushing the
chips back into the sockets (I know, but it works. note gently!), or just
firmly pushing on the chips first on one end and then the other. I've also
observes chips with one pin buckled
Hi Don,
Perhaps I needed to be clearer on the WD-40. I use one of the pen dispensers
with a fibre tip. Alternatively a slightly moistened lint free cloth. NOT an
aerosol. You do not want it everywhere, just the poard fingers. I don't apply
it to the sockets at all. If all you have is the
CRC or DeoxIT, if you must, but not WD-40.
On Fri, Feb 11, 2011 at 1:46 PM, Don Latham d...@montana.com wrote:
Paul is right! NO WD40, wrong stuff!!
The chips can be reseated by GENTLY twisting the baords and pushing the
chips back into the sockets (I know, but it works. note gently!),
if it works, it works, I guess. I do like deoxit, but wd40 is definitely
easier to come by. Yes, anything to move the chips around a little bit is
ok.
Shoulda known, most time nuts are pretty savvy.
Don
Robert Atkinson
Hi Don,
Perhaps I needed to be clearer on the WD-40. I use one of the pen
Hello and greetings to the list,
I'm a new member and would like to report on my efforts in controlling
the rubidium oscillator in the Lucent RFTG-m-RB module. I've been
sifting through the time-nuts archives but haven't found any success
stories on this apart from the original setup consisting
- Original Message
From: Magnus Danielson mag...@rubidium.dyndns.org
To: time-nuts@febo.com
Sent: Wed, February 9, 2011 10:08:40 PM
Subject: Re: [time-nuts] Calculate spectral content from a series of zero
crossing time stamps?
Wavecrest just fell of the Internet for some time and
WD40 (according to the MSDS) is principally Stodard Solvent and light petroleum
oil.
Stodard solvent can be thought of as pretty much as and having similar
properties to kerosene. The light petroleum oil can be thought of and having
simliar properties to something like 3 in 1 oil. I can't
Don I have seen the same amazing thing eproms with a pin folded over that
touched the auget socket and worked for years or maybe not and thats why I
ended up with the 5370.
But bottom line is I grab 5370s when I see them if they are the right price.
Have 4, all working now, most with the xtal
Hi Paul:
I have two 5370A's that I picked off epay years ago when prices were real.
What's happened, I don't know, but I can't afford to buy stuff that old
for inflated prices, and the shipping, yikes!
I'm converting to all USB instruments for future use, including SDR's,
that's why I tried to get
Don I have indeed looked at the usb instruments. Pretty amazing for the
costs actually.
But I have been fortunate to get out of the epay drug before $ went crazy.
(A better observation was I did not like the $ for the junk and risk) Also
been lucky to stumble into reasonably priced broken gear. So
In message aanlktim2gecwojag9scc+q7q8bvxe8vapf38mu_r_...@mail.gmail.com, paul
swed writes:
Still with a handful of these USB sensors and instruments my bench would be
1000 LBS lighter and the power consumption 20 watts.
Well... There is a nasty tendency to needed one laptop per instrument
to
On 2/11/2011 1:00 PM, paul swed wrote:
Then soap and water with elbow grease and they look like new and work well.
Regards
Paul.
I like automobile bug and tar remover for cleaning external panels on
old equipment. It is a moderate solvent. I've never seen it damage paint
but is strong
Speaking of which, I have some instruments I'd like to usb enable. The
instruments have analog output. Ideally I'd like to use a USB
microcontroller and simply read back the analog value. Once I have the
analog value I can handle it from there. If someone has some
experience doing such, please
Now that working 5372s are being sold for $50 repairing one may sound a bad
idea, but in my case shipping would be definitely prohibitive.
I have a 5373 that fails in Histogram, Count ICs, Gate Timer and Meas Rom,
point to possibly faulty chips in boards A3 and A5. As it seems to be a
generalized
In message aanlktikh0vv-x7wt8w8ghejm159+ac--zzwdbx6jm...@mail.gmail.com, Bob
Bownes writes:
Speaking of which, I have some instruments I'd like to usb enable. The
instruments have analog output. Ideally I'd like to use a USB
microcontroller and simply read back the analog value. Once I have the
On 11/02/11 22:51, Geraldo Lino de Campos wrote:
Now that working 5372s are being sold for $50 repairing one may sound a bad
idea, but in my case shipping would be definitely prohibitive.
I have a 5373 that fails in Histogram, Count ICs, Gate Timer and Meas Rom,
point to possibly faulty chips
On Thu, Feb 10, 2011 at 3:16 PM, Larry McDavid lmcda...@lmceng.com wrote:
Greetings! I am a new member of the mail list. I've been using a HP Z3801A
GPS-steered standard but have just acquired a Trimble Thunderbolt GPS
Disciplined Clock.
I'm seeking a recommendation for a power supply for
Previously I asked about the Austron 1150 and got excellent information.
How ever all data sheets I received show 28 Volt power requirement. My
units have labels stating 12 to 28 Volt. Do these units have internal
regulators
or what should I look out for. Thanks
Bert Kehren Miami
Bert,
The data sheet I sent you has a number of possible factory voltage options
indicated
where the specs show the operating voltage. Is there some specific marking on
the
one you have ? If so, then I would start out on the low side and slowly raise
the
voltage and evaluate the
Bert if I can help in anyway let me know. If as Bill says you have any pix
or you want to send it to me I will figure it out and get it back to you.
It would be my pleasure.
Regards
Paul
WB8TSL
On Fri, Feb 11, 2011 at 9:16 PM, ewkeh...@aol.com wrote:
Previously I asked about the Austron 1150
One approach for the Tbolt is to use a low dropout low noise linear
regulator (I used a LT1764 set to 11.5 volts) for the 12 volt input
(it is within spec) and a 5V switcher (Recom R-785.0-1.0) for the 5v.
For the minus 12v I used a ICL7662, these are rare, so a cmos gate
oscillator and
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