Re: 8566B PL1 Unlock, PL2 Unlock and Ref Unlock
On my 8566B, I found that I have little or no output from the 100Mhz cal signal as well.听 I haven't lifted the unit out of the rack yet, but to be clear, I have a blinking PL1 Unlock, PL2 Unlock and REF Unlock as well as the missing 100Mhz.听 Actually, the 100Mhz seems to be there but won't drive a 50ohm load at all.
I'll check the voltages today.听 By the way, I hope I need something specialized to fix this beast as I always enjoy a purchasing opportunity.听 I have 2 x 8568Bs, lots of scopes and voltmeters, signal generators, etc.听 What else could I need?
Any input?
Thanks
|
Re: HP 3455A stability issue
though some people have found old integration caps most likely you have a leaky FET.听 听They are tough to find but the section in the manual that addresses this problem should help.
|
Re: 1853-0063 transistor needed
Hi Manuel
听
The only x ref I have for a
1853-0063 听听is a 听听听听SJ 1528
Regards Paul B
From:
hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...]
Sent: 21 October 2017 18:26
To: hp_agilent_equipment@...
Subject: [hp_agilent_equipment]
1853-0063 transistor needed
听
听
Anyone
know of a source or cross reference for a 1853-0063 transistor used in the
410C? 听I鈥檝e already have a query into Walter at Sphere.
听
Thanks in
advance,
Manuel
No virus found in this message.
Checked by AVG -
Version: 2016.0.8013 / Virus Database: 4782/15057 - Release Date: 10/21/17
|
1853-0063 transistor needed
Anyone know of a source or cross reference for a 1853-0063 transistor used in the 410C? 听I鈥檝e already have a query into Walter at Sphere.
Thanks in advance, Manuel
|
On Sat, 21 Oct 2017 13:59:06 +0000 (UTC), you wrote: I'm having trouble unsubscribing.茂驴陆 Twice I've sent an unsubscribe request in, and twice I've confirmed it, but still getting posts.茂驴陆 Any ideas? Go to yahoo groups. Sign in. Go to "manage my groups" Select this one. click leave group. This should work for all groups you belong to. Harvey Bob - AE6RV
|
Re: Anti Static Vacuum Cleaners
Greetings,
I have had the same issue over the years and found that compressed air works great. 听It has been my experience that blowing the dust and crud off was more effective than trying to vacuum it.
While I have never damaged any equipment with the air blast from a basic compressor I am also aware of anti-static air compressor blow-off nozzles.
In the lab where I work we have a unit made by 3M, but I believe many other makers offer such devices. 听With a little research one might find inexpensive units, used devices available on eBay, or even discover how to make your one.
Regards,
Ken
toggle quoted message
Show quoted text
I looked around for something similar a while back. I was thinking of the vacuums used to clean out toner from printers (we used to have these when I worked for STK Printer Ops). They had small nozzles
and were very effective at cleaning up toner. I wasn't able to find anything remotely affordable.
I've always wondered about using compressed air on static-sensitive electronics. It seems to me to be a bad idea, ESD-wise, but I have no real experience.
DaveD
On 10/20/2017 9:31 PM, David Smith 听w6te@...听[hp_agilent_equipment]
wrote:
听
Greetings,
听
I was working on an HP 438A Power Meter yesterday which was absolutely filthy inside. This thing must have been run 24/7 in a filthy environment over the years. I had to replace the fan,
as usual, so I went ahead and pulled the power supply unit out to clean the dust and crap out of it. But, really, there was a layer of thick dust all over the unit.
听
This got me to thinking鈥� I need a better way of vacuuming and cleaning equipment that comes in that I won鈥檛 be fearful of damaging the cmos devices. Mind you I have a grounded ESD pad across
my bench that equipment sits on when it is being worked on and I always use a grounded wrist band on my wrist. I investigated some handheld vacuum cleaners and discovered a few models that are electrostatically safe. The cost was a bit of a shocker as they
sold for around $375 USD!!! (They must be very proud of their equipment.) What are the recommendations of the group for a hand held vacuum cleaner that would be safe to use around sensitive electronic equipment? I don鈥檛 mind spending $100 or so on something
but $375 is a bit out of the question.
听
Best regards,
听
Dave W6TE 听
听
Sent from听听for
Windows 10
听
|
Re: Anti Static Vacuum Cleaners
I know that when installing a dust collection system for a wood
shop, if metal ducting is not to be used, it is important that
discharge wires be run inside all the ductwork and grounded to the
dust collector in order to eliminate the possibility of dust
explosion due to static buildup. There have been stories over the
years in Fine Woodworking magazine about just such occurrences.
DaveD
On 10/20/2017 11:06 PM, Chuck Harris
cfharris@... [hp_agilent_equipment] wrote:
听
In general, it is not a problem. The thing with static
electricity
and vacuum cleaners is, though.
What happens is the dust inevitably has a charge, and when
it gets
dragged through the hose, it deposits its charge in the
vacuum
cleaner bin. As time goes on, that charge builds up, and
discharges
to the motor, and if there is lots of dust,
<>!
I was cleaning up sawdust from my basement floor one day,
and
there was quite a lot. I was doing the area around my
bandsaw,
and <>! The largest bolt of static I
have ever seen,
jumped between my elbow and the bandsaw's bed. It seemed
to be
5 or so inches long. Plastic hoses are the pits.
I had a coworker once that wanted to clean up his TRS-80,
and
asked about using a vacuum. I told him don't. He didn't
listen,
and the next day came telling of how the TRS-80 was
showing a
complete memory failure. Imagine.
Air passing through the hose potentially could deposit
charge too,
but usually doesn't because the blow gun is metal, and you
are holding
it, returning the charge back to ground. It would be quite
different
if your compressor was passing quantities of dust... but
most have
air filters.
-Chuck Harris
Dave Daniel kc0wjn@... [hp_agilent_equipment] wrote:
> I looked around for something similar a while back. I
was thinking of the vacuums
> used to clean out toner from printers (we used to
have these when I worked for STK
> Printer Ops). They had small nozzles and were very
effective at cleaning up toner. I
> wasn't able to find anything remotely affordable.
>
> I've always wondered about using compressed air on
static-sensitive electronics. It
> seems to me to be a bad idea, ESD-wise, but I have no
real experience.
>
> DaveD
>
> On 10/20/2017 9:31 PM, David Smith w6te@...
[hp_agilent_equipment] wrote:
>>
>> Greetings,
>>
>> I was working on an HP 438A Power Meter yesterday
which was absolutely filthy
>> inside. This thing must have been run 24/7 in a
filthy environment over the years.
>> I had to replace the fan, as usual, so I went
ahead and pulled the power supply
>> unit out to clean the dust and crap out of it.
But, really, there was a layer of
>> thick dust all over the unit.
>>
>> This got me to thinking鈥� I need a better way of
vacuuming and cleaning equipment
>> that comes in that I won鈥檛 be fearful of damaging
the cmos devices. Mind you I have
>> a grounded ESD pad across my bench that equipment
sits on when it is being worked
>> on and I always use a grounded wrist band on my
wrist. I investigated some handheld
>> vacuum cleaners and discovered a few models that
are electrostatically safe. The
>> cost was a bit of a shocker as they sold for
around $375 USD!!! (They must be very
>> proud of their equipment.) What are the
recommendations of the group for a hand
>> held vacuum cleaner that would be safe to use
around sensitive electronic
>> equipment? I don鈥檛 mind spending $100 or so on
something but $375 is a bit out of
>> the question.
>>
>> Best regards,
>>
>> Dave W6TE
>>
>> Sent from Mail
for
Windows 10
|
I'm having trouble unsubscribing.听 Twice I've sent an unsubscribe request in, and twice I've confirmed it, but still getting posts.听 Any ideas?
Bob - AE6RV
|
Re: Anti Static Vacuum Cleaners
Thar does, indeed, look like what we used to use. Thanks.
DaveD
On 10/21/2017 1:57 AM, Peter Loron
peterl@... [hp_agilent_equipment] wrote:
听
The 3M model 497 is an example of the kind of vacuum you
want for this work. They can be had used on eBay for <
$100.
-Pete
Greetings,
听
I
was working on an HP 438A Power Meter yesterday
which was absolutely filthy inside. This thing
must have been run 24/7 in a filthy environment
over the years. I had to replace the fan, as
usual, so I went ahead and pulled the power
supply unit out to clean the dust and crap out
of it. But, really, there was a layer of thick
dust all over the unit.
听
This
got me to thinking鈥� I need a better way of
vacuuming and cleaning equipment that comes in
that I won鈥檛 be fearful of damaging the cmos
devices. Mind you I have a grounded ESD pad
across my bench that equipment sits on when it
is being worked on and I always use a grounded
wrist band on my wrist. I investigated some
handheld vacuum cleaners and discovered a few
models that are electrostatically safe. The cost
was a bit of a shocker as they sold for around
$375 USD!!! (They must be very proud of their
equipment.) What are the recommendations of the
group for a hand held vacuum cleaner that would
be safe to use around sensitive electronic
equipment? I don鈥檛 mind spending $100 or so on
something but $375 is a bit out of the question.
听
Best
regards,
听
Dave
W6TE 听
听
Sent
from听听for
Windows 10
听
|
Hp3562a DSA A4 board WANTED
Has anyone got an A4 board (DFA) for the Hp3562a? I am looking for a parts machine in the UK too.听 Thanks Simon
|
HP 1740A HV Oscillator has stopped running
Hi everyone, the last time I asked a question I got some very good advice, so lets see if we have same luck this time.
I have the 1740A that I'm trying to restore, its in really good condition inside and out generally and certainly does not belong as landfill etc.
Last time I had distorted waveforms and your advice pointed me in the right direction and we resolved that issue and so while attempting to calibrate the scope a bit, the trace disappeared completely, did this a couple of times and never recovered. Pressing beam find confirmed that there was no HT.
Removed the HV cover and checked the supply rails coming in and all is correct but the oscillator is not running and I've confirmed this by using another scope and holding the probe in close proximity to the transformer and there is high frequency bleed at all. There is a 50Hz one if I turn the sensitivity all the way up, normally there is a high strength signal of around 30 to 40Khz but not on this one at present.
The voltages I'm getting on Q1, Q2 and Q3 are:
Q2听 Base听 听 听 听 听+16.8v Emitter听 听 听+15v Collector听 听 0v
Q1 Base听 听 听 听 听0v Emitter听 听 听0v
Collector听 听 +7.27v
Q3 Base听 听 听 听 听+7.27v Emitter听 听 听0v
Collector听 听 +22v
I should say as well that this particular board has the modifications to the Q1 and Q2 configuration which I have a photo of but not too sure how I can attach it in a fashion that you can see it, any ideas on how I submit the photo and on how I can resolve the oscillator issue?
All assistance is greatly appreciated.
Graham听听
|
Re: Anti Static Vacuum Cleaners
Dave 鈥� 听 About a year ago I bought a small vacuum that was specifically intended to clean computers. It will both suck or blow and has lots of attachments. I think it was around $100, but I am no longer sure. If you are interested I can provide more details. 73 鈥� Mike 听 Mike B. Feher, N4FS 89 Arnold Blvd. Howell NJ 07731 848-245-9115 听
toggle quoted message
Show quoted text
From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...] Sent: Friday, October 20, 2017 11:31 PM To: hp_agilent_equipment Subject: [hp_agilent_equipment] Anti Static Vacuum Cleaners 听 听 Greetings, 听 I was working on an HP 438A Power Meter yesterday which was absolutely filthy inside. This thing must have been run 24/7 in a filthy environment over the years. I had to replace the fan, as usual, so I went ahead and pulled the power supply unit out to clean the dust and crap out of it. But, really, there was a layer of thick dust all over the unit. 听 This got me to thinking鈥� I need a better way of vacuuming and cleaning equipment that comes in that I won鈥檛 be fearful of damaging the cmos devices. Mind you I have a grounded ESD pad across my bench that equipment sits on when it is being worked on and I always use a grounded wrist band on my wrist. I investigated some handheld vacuum cleaners and discovered a few models that are electrostatically safe. The cost was a bit of a shocker as they sold for around $375 USD!!! (They must be very proud of their equipment.) What are the recommendations of the group for a hand held vacuum cleaner that would be safe to use around sensitive electronic equipment? I don鈥檛 mind spending $100 or so on something but $375 is a bit out of the question. 听 Best regards, 听 Dave W6TE 听 听 Sent from for Windows 10 听
|
Hi Bob
听听听听听听听听听听
Well done in getting the olde going. I have just done the same with a 1725a. It
was received with no covers bent timebase shafts. Wiring looms cut and no power
supply power transistors on missing heatsink. The main problem was a warped
horizontal board to such an extent that the socketed main and delayed timebase boards
thro which the switch shafts run was out of line. This made for very intermittent
operation. It looked as though someone had got so fed up with this they had hit
the timebase knobs with a hammer and bent everything. If you want I can photo
these so u can make something on a lathe (1701 and 1725 knobs look similar). I
clamped both timebase boards to the scope side member now its reliable. I
wanted something to enable me to see pulses from a Geiger tube the old 545a was
not up to it. 听
听
Cheers Keith G0SKJ
听
-----Original
Message-----
From:
hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...]
Sent: 21 October 2017 04:48
To:
hp_agilent_equipment@...
Subject: [hp_agilent_equipment]
KNOBS HP1701 SCOPE
听
听
HELLO to the Group...
听
Recently aquired a slightly damaged 1701 scope.
The three knobs on the time base selector were
missing, and all three shafts were bent..Through
some subtle persuation, and lots of praying, I got
the shafts stright. To my surprise, when I powered
it up and turned a couple of knobs, a nice bright
sharpe trace appeared.........
Now comes my real problem...听听
听KNOBS听听 ..........
HP part #s
听0370 2173
听0370 1129
听01710 57404
Hoping someone has some idea where I migth
听find them or even a parts unit. (reasonable $$)
听
听
Thanks.....听听听听听听
...BOB...听听听 KD0IJI@...
|
Re: 5342A: blown sampler?
I have a 5342A with option 005 which extends operation from 18GHz to 24GHz. It has the original N-type connector though. So I expect there must be other hardware changes, or as Steve K suggests selected parts.听 The option cost $500 extra.
Steve
On 鈥嶧riday鈥�, 鈥嶰ctober鈥� 鈥�20鈥�, 鈥�2017鈥� 鈥�02鈥�:鈥�00鈥�:鈥�22鈥� 鈥嶱M鈥� 鈥嶣ST, Steve - Home Steve-Krull@... [hp_agilent_equipment] wrote:
听
I鈥檝e done the connector change and, using a good quality SMA, I have two 5342As that count reliably to 26GHz and one that just won鈥檛 count reliably above about 21GHz. I don鈥檛 have a 5343A to compare to but I wonder if maybe they were just hand-selected 5342As?
听
Hi Harke,
oh, interesting. So the upgrade to 26 GHz, which would actually be a 5343A, changes only the connector? :-)
This is funny, because I use a HP 8563E spectrum analyzer at work, which operates fine at 26.5 GHz using a N connector!
Best
Tobias
听
Hello Tobias,
Congrats on the repair! Happy for you the sampler was fine! I can only comment on the frequency range. I have a number of HP equipment (including the HP5342A) that are spec'd to 20-22 GHz and with an (expensive) option that range can be extended to 26
GHz. The only hw change is the input connector that goes from N to APC3.5. No other change! Try the counter at 24 GHz and you will see it will work!
Good luck!
Harke
听
Hi all,
problem solved: as I said, the counter was counting fine on the low frequency input, but on the high frequency input, it displayed only zeros. The reason was that
a) the -5.2V operating voltage was out of the spec
b) the solder joint between the semirigid coax to the front panel's N connector cracked, thus the semirigid was no longer connected to the connector. I re-soldered and now it counts fine (only tested with 2 GHz so far).
I wonder whether it is possible to replace the ROM. It would be nice to add option 004, the DAC. I have couple of DAC80 here, however, opt. 004 needs a different ROM, unfortunately.
I also read that there was an option 005, which extends the frequency range to 24 GHz. Does someone know what option 005 actually was? was it a different sampler, or something that can easily be changed?
Tobias
听
Hi,
Your measurements with the diode mode suggest the sampler is OK, digital meters don't use the same amount of current to test resistance as older analogue meters and that's the reason you didn't get their readings.
I agree with Steve, you may need to replace a number of the 1826-0371, either on the A8 main VCO, A4 offset VCO or both.
I'd also check the A5 output to see if you're getting drive to the sampler driver and then check the sampler driver A26 itself.
I'd check in that order, check the VCOs are outputting signal, check the A5 to ensure it's outputting a signal to听A26 and it should alternate between the two VCOs, then check A26.
To check the sampler driver A26听you really need a听spectrum analyser. As most spectrum analysers have a capacitor (DC block) in the front end you need to terminate the A26 module with 50 Ohm and then measure what you see ac ross that with the spec an, if
you see lots of harmonics then all is good. You will not see anything听(apart from the 325MHz drive) without a dc return for the step recovery diode.
If the A26 is not working that could either be the SRD or it could be U1 on the A26 module - I have seen faulty U1 ICs in the past, most likely due to heat - they run very hot.
For the 1826-0371, you can buy fakes/replicas/copies off ebay or do what I do, I make a small smd pcb with 2 x 2sc3356 transistors, 2 x 100 ohm resistors and a 120 ohm resistor in the emitter lead听(all smd components)听with pins to fit in the DIP footprint.
You'll see the schematic for the 1826-0371 on a number of the 5342A schematics. I've not had any issue with my made up boards yet.
If you find it is U1 on the A5 module I can also give you an alternative circuit for that but it is not quite optimised yet 听and听requires short leads to minimise parasi tics.
Good luck
Greg
|
Re: Anti Static Vacuum Cleaners
Thanks Pete,
Yes, that will fit the bill� exactly what I抦 looking for!
Sent from Mail<> for Windows 10
From: Peter Loron peterl@... [hp_agilent_equipment]<mailto:hp_agilent_equipment@...>
Sent: Saturday, October 21, 2017 12:57 AM
To: hp_agilent_equipment@...<mailto:hp_agilent_equipment@...>
Subject: Re: [hp_agilent_equipment] Anti Static Vacuum Cleaners
The 3M model 497 is an example of the kind of vacuum you want for this work. They can be had used on eBay for < $100.
-Pete
On Oct 20, 2017, at 20:31, David Smith w6te@...<mailto:w6te@...> [hp_agilent_equipment] <hp_agilent_equipment@...<mailto:hp_agilent_equipment@...>> wrote:
Greetings,
I was working on an HP 438A Power Meter yesterday which was absolutely filthy inside. This thing must have been run 24/7 in a filthy environment over the years. I had to replace the fan, as usual, so I went ahead and pulled the power supply unit out to clean the dust and crap out of it. But, really, there was a layer of thick dust all over the unit.
This got me to thinking� I need a better way of vacuuming and cleaning equipment that comes in that I won抰 be fearful of damaging the cmos devices. Mind you I have a grounded ESD pad across my bench that equipment sits on when it is being worked on and I always use a grounded wrist band on my wrist. I investigated some handheld vacuum cleaners and discovered a few models that are electrostatically safe. The cost was a bit of a shocker as they sold for around $375 USD!!! (They must be very proud of their equipment.) What are the recommendations of the group for a hand held vacuum cleaner that would be safe to use around sensitive electronic equipment? I don抰 mind spending $100 or so on something but $375 is a bit out of the question.
Best regards,
Dave W6TE
Sent from Mail<> for Windows 10
[Non-text portions of this message have been removed]
|
Re: Anti Static Vacuum Cleaners
The 3M model 497 is an example of the kind of vacuum you want for this work. They can be had used on eBay for < $100.
-Pete
toggle quoted message
Show quoted text
Greetings, 听 I was working on an HP 438A Power Meter yesterday which was absolutely filthy inside. This thing must have been run 24/7 in a filthy environment over the years. I had to replace the fan, as usual, so I went ahead and pulled the power supply unit out to clean the dust and crap out of it. But, really, there was a layer of thick dust all over the unit. 听 This got me to thinking鈥� I need a better way of vacuuming and cleaning equipment that comes in that I won鈥檛 be fearful of damaging the cmos devices. Mind you I have a grounded ESD pad across my bench that equipment sits on when it is being worked on and I always use a grounded wrist band on my wrist. I investigated some handheld vacuum cleaners and discovered a few models that are electrostatically safe. The cost was a bit of a shocker as they sold for around $375 USD!!! (They must be very proud of their equipment.) What are the recommendations of the group for a hand held vacuum cleaner that would be safe to use around sensitive electronic equipment? I don鈥檛 mind spending $100 or so on something but $375 is a bit out of the question. 听 Best regards, 听 Dave W6TE 听 听 Sent from听听for Windows 10 听
|
Re: Anti Static Vacuum Cleaners
In general, it is not a problem. The thing with static electricity
and vacuum cleaners is, though.
What happens is the dust inevitably has a charge, and when it gets
dragged through the hose, it deposits its charge in the vacuum
cleaner bin. As time goes on, that charge builds up, and discharges
to the motor, and if there is lots of dust, <<BOOM>>!
I was cleaning up sawdust from my basement floor one day, and
there was quite a lot. I was doing the area around my bandsaw,
and <<BUZZAAP>>! The largest bolt of static I have ever seen,
jumped between my elbow and the bandsaw's bed. It seemed to be
5 or so inches long. Plastic hoses are the pits.
I had a coworker once that wanted to clean up his TRS-80, and
asked about using a vacuum. I told him don't. He didn't listen,
and the next day came telling of how the TRS-80 was showing a
complete memory failure. Imagine.
Air passing through the hose potentially could deposit charge too,
but usually doesn't because the blow gun is metal, and you are holding
it, returning the charge back to ground. It would be quite different
if your compressor was passing quantities of dust... but most have
air filters.
-Chuck Harris
Dave Daniel kc0wjn@... [hp_agilent_equipment] wrote:
toggle quoted message
Show quoted text
I looked around for something similar a while back. I was thinking of the vacuums
used to clean out toner from printers (we used to have these when I worked for STK
Printer Ops). They had small nozzles and were very effective at cleaning up toner. I
wasn't able to find anything remotely affordable.
I've always wondered about using compressed air on static-sensitive electronics. It
seems to me to be a bad idea, ESD-wise, but I have no real experience.
DaveD
On 10/20/2017 9:31 PM, David Smith w6te@... [hp_agilent_equipment] wrote:
Greetings,
I was working on an HP 438A Power Meter yesterday which was absolutely filthy
inside. This thing must have been run 24/7 in a filthy environment over the years.
I had to replace the fan, as usual, so I went ahead and pulled the power supply
unit out to clean the dust and crap out of it. But, really, there was a layer of
thick dust all over the unit.
This got me to thinking鈥� I need a better way of vacuuming and cleaning equipment
that comes in that I won鈥檛 be fearful of damaging the cmos devices. Mind you I have
a grounded ESD pad across my bench that equipment sits on when it is being worked
on and I always use a grounded wrist band on my wrist. I investigated some handheld
vacuum cleaners and discovered a few models that are electrostatically safe. The
cost was a bit of a shocker as they sold for around $375 USD!!! (They must be very
proud of their equipment.) What are the recommendations of the group for a hand
held vacuum cleaner that would be safe to use around sensitive electronic
equipment? I don鈥檛 mind spending $100 or so on something but $375 is a bit out of
the question.
Best regards,
Dave W6TE
Sent from Mail <> for Windows 10
|
Re: Anti Static Vacuum Cleaners
I looked around for something similar a while back. I was thinking
of the vacuums used to clean out toner from printers (we used to
have these when I worked for STK Printer Ops). They had small
nozzles and were very effective at cleaning up toner. I wasn't able
to find anything remotely affordable.
I've always wondered about using compressed air on static-sensitive
electronics. It seems to me to be a bad idea, ESD-wise, but I have
no real experience.
DaveD
On 10/20/2017 9:31 PM, David Smith
w6te@... [hp_agilent_equipment] wrote:
茂驴陆
Greetings,
茂驴陆
I was working on an HP 438A Power
Meter yesterday which was absolutely filthy inside. This
thing must have been run 24/7 in a filthy environment
over the years. I had to replace the fan, as usual, so I
went ahead and pulled the power supply unit out to clean
the dust and crap out of it. But, really, there was a
layer of thick dust all over the unit.
茂驴陆
This got me to thinking茂驴陆 I need a
better way of vacuuming and cleaning equipment that
comes in that I won茂驴陆t be fearful of damaging the cmos
devices. Mind you I have a grounded ESD pad across my
bench that equipment sits on when it is being worked on
and I always use a grounded wrist band on my wrist. I
investigated some handheld vacuum cleaners and
discovered a few models that are electrostatically safe.
The cost was a bit of a shocker as they sold for around
$375 USD!!! (They must be very proud of their
equipment.) What are the recommendations of the group
for a hand held vacuum cleaner that would be safe to use
around sensitive electronic equipment? I don茂驴陆t mind
spending $100 or so on something but $375 is a bit out
of the question.
茂驴陆
Best regards,
茂驴陆
Dave W6TE 茂驴陆
茂驴陆
Sent from for Windows 10
茂驴陆
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HELLO to the Group...
Recently aquired a slightly damaged 1701 scope. The three knobs on the time base selector were missing, and all three shafts were bent..Through some subtle persuation, and lots of praying, I got the shafts stright. To my surprise, when I powered it up and turned a couple of knobs, a nice bright sharpe trace appeared......... Now comes my real problem...听听 听KNOBS听听 .......... HP part #s 听0370 2173 听0370 1129 听01710 57404 Hoping someone has some idea where I migth 听find them or even a parts unit. (reasonable $$)
Thanks.....听听听听听听 ...BOB...听听听 KD0IJI@...
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Re: Anti Static Vacuum Cleaners
Yeah, static rated vacs are a royal pain.
Easy way? Go outside with compressed air! :)
Or build a box with pegboard on top and an inlet for a shop vac. Also good for sanding on and not getting sawdust everywhere.
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Greetings,
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I was working on an HP 438A Power Meter yesterday which was absolutely filthy inside. This thing must have been run 24/7 in a filthy environment over the years. I had to replace the fan, as usual, so I went ahead and pulled the power supply
unit out to clean the dust and crap out of it. But, really, there was a layer of thick dust all over the unit.
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This got me to thinking鈥� I need a better way of vacuuming and cleaning equipment that comes in that I won鈥檛 be fearful of damaging the cmos devices. Mind you I have a grounded ESD pad across my bench that equipment sits on when it is being
worked on and I always use a grounded wrist band on my wrist. I investigated some handheld vacuum cleaners and discovered a few models that are electrostatically safe. The cost was a bit of a shocker as they sold for around $375 USD!!! (They must be very proud
of their equipment.) What are the recommendations of the group for a hand held vacuum cleaner that would be safe to use around sensitive electronic equipment? I don鈥檛 mind spending $100 or so on something but $375 is a bit out of the question.
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Best regards,
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Dave W6TE 听
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Sent from for Windows 10
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Paul Bicknell
Dave Smith
bownes