have a look here http://www.df9np.de/page4.html all is already done
regards, Francois F1CHF
|
Distribution divider/amplifier for 10MHz GPSDO
Thanks to all who responded. Looks like I need a VDA, some 74HC logic, and a couple of 3TR`s to get this project going. Cheers..............................................Don ZL4GX
|
Re: need Bill West switches
Thanks for the help dear fori
Jim took care of me and the unit is all together now, that was fast.
Cheers
Alan
|
HP5335A aluminum frame and covers
Here are some leftover parts:
|
Re: Distribution divider/amplifier for 10MHz GPSDO
Stuart K6YAZ mentioed isoltion of outputs. This need not be expensive if you have a source of computer junk. 10Mbs Ethernet cards have multi channel isolation transformers (and sometimes BALUNs and filters) that are ideal for 10MHz distribution systems.
I also recommend the use of Video distribution amplifiers. Extron ones are some of the best and can be quite cheap used.
Robert G8RPI.
|
Hi,
Is it possible to get pics of the 576 CT and scope carts?
Thanks for the attention.
Regards,
Sam
|
Ben,
That’s possible and much cheaper. I’ll get pictures tomorrow or Friday.?
Bob
toggle quoted message
Show quoted text
On Oct 24, 2017, at 20:17, Tam Hanna tamhan@... [hp_agilent_equipment] < hp_agilent_equipment@...> wrote:
?
Hello,
sorry to ask: the 4195A test kit, do you mean the legendary
impendance adapter for it or the normal six SMA unit?
Tam
On 25.10.2017 01:45, Bob Bownes
bownes@... [hp_agilent_equipment] wrote:
?
Folks,
I'm going to be
getting rid of the following this weekend if anyone is
interested. The equipment is located in Albany, N.Y.
USA. I'd love to see it go to someone who cares before
it goes to someone who is going to reclaim it for the
gold.
Expect the older
HP stuff to go pretty cheap. Don't expect the newer
stuff to go for scrap prices, but reasonable offers
won't be passed up.
I'm really not
inclined to want to pack and ship any of this, so onsite
is preferred. If you want it packed and shipped, it will
cost actual shipping charges, plus double box costs with
some foam in bag packages, etc. e.g. expect $50 or more
just to pack it. See above comments about not wanting to
pack and ship. :)
Forgive me the
non HP gear in the list. ;)
Feel free to
spread the word.
Bob
| HP 3336C Synthesized generator |
| HP 8657A signal generator |
| Tek TDS744A |
| Tek TDS3032 |
| Tek DSA 601 |
| Tek DSA 602 |
| Tek 7603 rack mount scope w 7D20
digitizer |
| Tek 7603 rack mount scope w 7D20
digitizer |
| Tek 1.3GHz counter cm251 |
| Tek CD250 175MHz counter |
| HP 8920A Test Set |
| HP 4935A |
| Hp 4935A w software |
| HP 8011A Pulse generator |
| HP 8013B Pulse generator |
| Tektronix K6042 w probe |
| Tektronix K6042 w probe |
| Tektronix K6042 w probe |
| Tektronix 576 curve tracer w
accessories, test fixtures, current pulser |
| HP 8656B signal generator |
| HP 4195A network analyzer w test set |
| HP 33120A arbitrary waveform
generator |
| HP 6030A power supply |
|
Bertan High voltage Power Supply
(1Kv)
|
| High voltage Power Supply - new
0-600v |
| High voltage Power Supply - new
0-600v |
| Hi-Pot tester |
| Fluke 23 meter |
| Fluke 23 meter |
| GenRad Type 107 Variable Inductor -
Vintage |
| HP 214A Pulse generator |
| Tektronix 7704A Oscilloscope |
| Tektronix 2235 Oscilloscope |
| Tek TMS504 mainframe? w
modules |
| Tek TMS504 mainframe - empty |
| Tek TMS 501 Mainframe |
| Tek TMS 503 mainframe w3x? AM503
probe amplifier modules |
| Tek TMS 503 mainframe w2x? AM503
probe amplifier modules |
| Tek TMS 503 mainframe w? signal
generator modules |
| HP 211B square wave generator |
| Tektronix scope carts |
| Tektronix PS2521 Programmable P/S w
gpib |
| Tektronix PS2521 Programmable P/S w
gpib |
| Bench Power supply |
| Bench Power supply |
| Bench Power supply |
| Simpson replacement meters |
|
toggle quoted message
Show quoted text
On Oct 24, 2017, at 20:17, Tam Hanna tamhan@... [hp_agilent_equipment] < hp_agilent_equipment@...> wrote:
?
Hello,
sorry to ask: the 4195A test kit, do you mean the legendary
impendance adapter for it or the normal six SMA unit?
Tam
On 25.10.2017 01:45, Bob Bownes
bownes@... [hp_agilent_equipment] wrote:
?
Folks,
I'm going to be
getting rid of the following this weekend if anyone is
interested. The equipment is located in Albany, N.Y.
USA. I'd love to see it go to someone who cares before
it goes to someone who is going to reclaim it for the
gold.
Expect the older
HP stuff to go pretty cheap. Don't expect the newer
stuff to go for scrap prices, but reasonable offers
won't be passed up.
I'm really not
inclined to want to pack and ship any of this, so onsite
is preferred. If you want it packed and shipped, it will
cost actual shipping charges, plus double box costs with
some foam in bag packages, etc. e.g. expect $50 or more
just to pack it. See above comments about not wanting to
pack and ship. :)
Forgive me the
non HP gear in the list. ;)
Feel free to
spread the word.
Bob
| HP 3336C Synthesized generator |
| HP 8657A signal generator |
| Tek TDS744A |
| Tek TDS3032 |
| Tek DSA 601 |
| Tek DSA 602 |
| Tek 7603 rack mount scope w 7D20
digitizer |
| Tek 7603 rack mount scope w 7D20
digitizer |
| Tek 1.3GHz counter cm251 |
| Tek CD250 175MHz counter |
| HP 8920A Test Set |
| HP 4935A |
| Hp 4935A w software |
| HP 8011A Pulse generator |
| HP 8013B Pulse generator |
| Tektronix K6042 w probe |
| Tektronix K6042 w probe |
| Tektronix K6042 w probe |
| Tektronix 576 curve tracer w
accessories, test fixtures, current pulser |
| HP 8656B signal generator |
| HP 4195A network analyzer w test set |
| HP 33120A arbitrary waveform
generator |
| HP 6030A power supply |
|
Bertan High voltage Power Supply
(1Kv)
|
| High voltage Power Supply - new
0-600v |
| High voltage Power Supply - new
0-600v |
| Hi-Pot tester |
| Fluke 23 meter |
| Fluke 23 meter |
| GenRad Type 107 Variable Inductor -
Vintage |
| HP 214A Pulse generator |
| Tektronix 7704A Oscilloscope |
| Tektronix 2235 Oscilloscope |
| Tek TMS504 mainframe? w
modules |
| Tek TMS504 mainframe - empty |
| Tek TMS 501 Mainframe |
| Tek TMS 503 mainframe w3x? AM503
probe amplifier modules |
| Tek TMS 503 mainframe w2x? AM503
probe amplifier modules |
| Tek TMS 503 mainframe w? signal
generator modules |
| HP 211B square wave generator |
| Tektronix scope carts |
| Tektronix PS2521 Programmable P/S w
gpib |
| Tektronix PS2521 Programmable P/S w
gpib |
| Bench Power supply |
| Bench Power supply |
| Bench Power supply |
| Simpson replacement meters |
|
Re: Loading 8340 FW into a 8341 sweeper
Hi Guys
I also tried to retrofit my 8341A to an 8340A. It works, kind of - I could actually set the frequency to 26.5GHz and I saw the signal on the spectrum analyzer.
However, leveling was completely crappy and didn't work properly above approx. 22GHz, so, I retrofitted my unit back to the 8341A it was before. However, I think the ALC could probably be calibrated, but I cannot do that unfortunately because I don't have
that frequency response test set or storage normalizer which is required to test and adjust the ALC (I don't even know what a frequency response test set is, but sounds like a VNA).
I tested the 8341A flatness using CW mode and documented my results here
https://hb9fsx.ch/wordpress/index.php/2017/10/13/hp-8341a-repair-part-iii/
in the 'update' section (scroll down). When I activated the 26.5GHz operation, behaviour over 22GHz was much worse than these results.
(any ideas how that unit can be calibrated without using a storage normalizer and all this stuff?).
Tobias
toggle quoted message
Show quoted text
-------- Original message --------
From: "rastr0@... [hp_agilent_equipment]"
Date: 10/25/17 18:37 (GMT+01:00)
To: hp_agilent_equipment@...
Subject: [hp_agilent_equipment] Re: Loading 8340 FW into a 8341 sweeper
?
Calvin,
I tried putting a CPU from an HP 8340B into a 8340A and it booted but did not work properly.? I didn't investigate the issue very far.? I can't imagine you would have better luck with a 8341 - but you may find a work-around.
-rastro
|
Re: parts units: front castings, was Re: need Bill West switches
On 10/24/2017 11:08 PM, Glenn Little WB4UIV glennmaillist@... [hp_agilent_equipment] wrote: I may be able to help with the 8566 front.
I will know later in the week. Ok, thank you Glenn. I've got one 5.25" frame on the way; I actually need two, so this covers me if you find one. Do you just need the front frame or the overlays / inserts also? Just the front frame. I'm still looking for one of the larger ones (8.75", 5U) for the 3562A, if anyone has one. -Dave -- Dave McGuire, AK4HZ New Kensington, PA
|
Re: Loading 8340 FW into a 8341 sweeper
Calvin,
I tried putting a CPU from an HP 8340B into a 8340A and it booted but did not work properly.? I didn't investigate the issue very far.? I can't imagine you would have better luck with a 8341 - but you may find a work-around.
-rastro
|
Re: Loading 8340 FW into a 8341 sweeper
Hello all,
I'd have to say its most certainly possible. Even an A model can turn into or rather be upgraded to a B model. Just gotta find the right parts which isn't much. You could even make them too! (say create your own assembly board, bias board, or drill a hole that is missing like the FM input). Also if you have the time, that helps too. ;)
As for YTOs I wouldn't sweat it too much. They are easily swappable despite different part numbers. I'd pick the higher number of the 2 of course, since the higher one is newer with improvements for that time. Another keyword is for that time. It is even possible to take a YTO from a completely different instrument and just stick it in this unit if the donor unit was made around the same time as this unit. You may have to redesign the bias PCB on top though.
While its true you could create a secondary market with something that has less bandwidth, another point is that redesigning parts then manufacturing them again costs lots of money. Companies don't like waste money so they'll turn up the same design with some minor improvement. Maybe add some extra marketing wank along the way.
Recent case of "within model series" (8560X series; X= A, B, E or EC) is when I swapped a 5086-7781 for a 5086-7906 in a 8561B to a 8563E's. The only difference I saw between the 2 YTOs was a "purge port" that was added then later deleted possibily because its not needed. The hybrid circuit, YIG ball, overall physical dimensions, and even the bias PCB on top outside remained the same.
However don't get too eager with converting same models of units. I currently can't convert a 8561E to a 8563E. Mainly because the RF and Frequency boards are very different and are not cheap to make or buy yet. Plus you'd have to screw around with the ROM to read 8563E instead of 8561E (if you want the higher model). If there are people willing to desolder their ROMs for reading and post the results, this would be great.
Very recently I have found a case for obtaining parts for dissimilar units. Rather they are marketed as such. I've found out that the same hybrid circuit "block", which I thought was unobtainium at first, is used in 4 different units or at least marketed as different units. 2 of them are analyzers and 2 of them are generators. The generators are of different model numbers while the analyzers are marketed for different measurements. Currently I'm in the delicate process of obtaining a part or 2 from something that is "really trashed" so I can't disclose exactly what are the model numbers but if there is a HP engineer in Microwave ICs from the 80s and 90s amongst us, they'll confirm what I am saying. I also detest destroying a perfectly repairable unit just to get 1 part out of it.
Then of course for sure you can find that hard to find IC like that datel in the other thread and check if any other different piece of kit or board uses the same IC. I'd say ~9 of 10 this is where I get my pulls from. The parts list in service manuals are fountains of info for this purpose. If lucky enough, perhaps you could even google "part number .pdf" and a few hits turn up if someone mirrors the same pdf (like some testequipmentsales site or even here).
Overall, if one is willing to spend time and effort moving mountains and the heavens then it is possible. Things like google and search engines in general have made this journey way too easy than in the past. For that I thank the people who were nice enough to provide the data or set up such search functions. You can even make this journey for pennies if you're creative enough. Can never really say "can't be done". There is always a way.
-Lex
|
Re: Loading 8340 FW into a 8341 sweeper
The service manual lists different part numbers for some assemblies.
The YTO is one.
Possibly there were enough YTOs that did not meet spec for the 8340
that the 8341 was built to use these parts that did not pass for the
8340.
There would have been sufficient market for the reduced frequency
range.
The US military bought a number of 8340s with the same coverage as
the 8341 and with a type N connector for output.
This 8340 had a mod number and could possibly be made a fully
functional 8340 by changing the connector and calibration constants.
I suspect that the 8341 will not function to specification if
calibration constants were entered for the range of the 8340.
This is my opinion based on the technical manuals and a very little
knowlege of how products are brought to market.
Glenn
Hey, which correction constant is it?
this is really cool :-)
So are the 8340's just selected 8341's?
Or is there some other difference between the models?
Tobias
-------- Original message --------
From: "Peter Hansen oz1lpr@...
[hp_agilent_equipment]"
Date: 10/25/17 00:11 (GMT+01:00)
Subject: Sv: [hp_agilent_equipment] Loading 8340 FW into a
8341 sweeper
???
Hi there it is much easiere just take the caibration
letter inside the unit and look for the line with the
model number. Simply enter the 8340 in there and you
have a 26.5Ghz generator. It might have a few dbm
lower output as the SYTM is not calibrated upthere.
You???can look in the manual how to change the values
in the EEprom through the buttons on the front panel.
best regards Peter
???
This may sounds crazy but have anyone
tried to put the 8340 CPU board into a
8341 or just the FW prom?
I looked through a lot of the
schematics and comparing the part numbers
for major assemblies, they look extremely
similar. The 8341 level control logic also
has the 20Ghz breakout support just like
8340 does.
Although 8341 has a 20Ghz SYTM and
8340 has a 26.5g one, but the SYTM driver
and control logic assemblies are
identical.
I'm sure there will be some differences in
the CPU boards (FW ROM) that disables band 4
in 8341. I am curious if a 8341 SYTM can be
overdriven to send out 26.5ghz at usable
output level if the CPU board allows it?
Based on my previous experience with SRD, n
and n+1 harmonics are pretty comparable in
amplitude, and having YIG filter march up
couple gigs is not impossible.
Thanks,
Calvin
--
-----------------------------------------------------------------------
Glenn Little ETCS(SS) USN Ret, ARRL Technical Specialist, SBE ARRL TAPR
Amateur Callsign: WB4UIV wb4uiv@... AMSAT LM 2178
QTH: Goose Creek, SC USA (EM92xx) USSVI, FRA, NRA LM QCWA LM 28417
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"
---------------------------------------------------------------------------
|
Re: Replacement for Inter-Board Connectors on 3325a
One way is to find a scrapper and rob its cables – that way you get the right type.
There must be a terminally poorly or part stripped 3325 that could yield cables somewhere.
Regards
?
toggle quoted message
Show quoted text
From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...]
Sent: 24 October 2017 23:20
To: hp_agilent_equipment@...
Subject: [hp_agilent_equipment] Replacement for Inter-Board Connectors on 3325a
?
?
I want to add an 002 option board to my 3325a. I need four board to board connector cables. The connectors on these cables seem to be some sort of rf type. Are they a known rf connector in current production? If these connectors aren't available, can someone
suggest a suitable replacement? I have found it possible to cut an rca jack pin flush with its sleeve, and then insert into the female connectors on the boards. I don't trust this since the modified rca jack may not be making good contact, and the original
cables may have a controlled impedance I have to duplicate.
?
Any ideas?
?
Stan
|
Re: Distribution divider/amplifier for 10MHz GPSDO
I did some serious tests with a frame of Leitch/Harris video das. They were flat out to 10 to 12 meg. There are gain jumpers for 0 ,3 and 6 DB and a trim pot for level matching. You can cascade them for more gain if you need it. The difference between 75 ohm and 50 ohm operation is an SWR of 1.5:1 or whatever the return loss is for that. If you want to be a purist, you can change the 75 ohm output resistors to 50 ohm on each da! Anyway the result a very useable reference distribution system for 10 MHZ signals. ? Randy VE3OGB ? ?
toggle quoted message
Show quoted text
From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...]
Sent: October 24, 2017 8:02 AM
To: hp_agilent_equipment@...
Subject: [hp_agilent_equipment] Re: Distribution divider/amplifier for 10MHz GPSDO? ? Video dist. amps work fine as well.
The 75 ohms can be easily modded IF req 'd, but usually its fine as is.
Ebay # 232525266593
|
Re: Loading 8340 FW into a 8341 sweeper
Hi Tobias,
Instr. Preset
Sh GHz??? 1 Hz
Sh MHz 12 Hz
Sh kHz 22 Hz
enter Value
Press Hz
Zum ???ndern des Frequenzbereichs:
Sh GHz 54 Hz
Sh MHz 12 Hz
Sh kHz 22 Hz
20000 -> 26500
Hz
to Store:
Sh MHz?????? 14 Hz
Sh kHz 5349 Hz
Instr. Preset
mfg, Rainer
Am 25.10.2017 um 07:16 schrieb Tobias Pluess
tobias.pluess@... [hp_agilent_equipment]:
toggle quoted message
Show quoted text
???
Hey, which correction constant is it?
this is really cool :-)
So are the 8340's just selected 8341's?
Or is there some other difference between the models?
Tobias
-------- Original message --------
From: "Peter Hansen oz1lpr@...
[hp_agilent_equipment]"
Date: 10/25/17 00:11 (GMT+01:00)
Subject: Sv: [hp_agilent_equipment] Loading 8340 FW
into a 8341 sweeper
???
Hi there it is much easiere just take the
caibration letter inside the unit and look for
the line with the model number. Simply enter the
8340 in there and you have a 26.5Ghz generator.
It might have a few dbm lower output as the SYTM
is not calibrated upthere.
You???can look in the manual how to change the
values in the EEprom through the buttons on the
front panel.
best regards Peter
???
This may sounds crazy but have
anyone tried to put the 8340 CPU
board into a 8341 or just the FW
prom?
I looked through a lot of the
schematics and comparing the part
numbers for major assemblies, they
look extremely similar. The 8341
level control logic also has the
20Ghz breakout support just like
8340 does.
Although 8341 has a 20Ghz SYTM
and 8340 has a 26.5g one, but the
SYTM driver and control logic
assemblies are identical.
I'm sure there will be some
differences in the CPU boards (FW ROM)
that disables band 4 in 8341. I am
curious if a 8341 SYTM can be
overdriven to send out 26.5ghz at
usable output level if the CPU board
allows it? Based on my previous
experience with SRD, n and n+1
harmonics are pretty comparable in
amplitude, and having YIG filter march
up couple gigs is not impossible.
Thanks,
Calvin
|
Re: Loading 8340 FW into a 8341 sweeper
Hey, which correction constant is it?
this is really cool :-)
So are the 8340's just selected 8341's?
Or is there some other difference between the models?
Tobias
toggle quoted message
Show quoted text
-------- Original message --------
From: "Peter Hansen oz1lpr@... [hp_agilent_equipment]"
Date: 10/25/17 00:11 (GMT+01:00)
To: hp_agilent_equipment@...
Subject: Sv: [hp_agilent_equipment] Loading 8340 FW into a 8341 sweeper
?
Hi there it is much easiere just take the caibration letter inside the unit and look for the line with the model number. Simply enter the 8340 in there and you have a 26.5Ghz generator. It might have a few dbm lower output as the SYTM is not calibrated upthere.
You?can look in the manual how to change the values in the EEprom through the buttons on the front panel.
best regards Peter
Fra: hp_agilent_equipment@... p? vegne af guancalvin@... [hp_agilent_equipment]
Sendt: 24. oktober 2017 23:45
Til: hp_agilent_equipment@...
Emne: [hp_agilent_equipment] Loading 8340 FW into a 8341 sweeper
?
?
This may sounds crazy but have anyone tried to put the 8340 CPU board into a 8341 or just the FW prom?
I looked through a lot of the schematics and comparing the part numbers for major assemblies, they look extremely similar. The 8341 level control logic also has the 20Ghz breakout support just like 8340 does.
Although 8341 has a 20Ghz SYTM and 8340 has a 26.5g one, but the SYTM driver and control logic assemblies are identical.
I'm sure there will be some differences in the CPU boards (FW ROM) that disables band 4 in 8341. I am curious if a 8341 SYTM can be overdriven to send out 26.5ghz at usable output level if the CPU board allows it? Based on my previous experience with SRD,
n and n+1 harmonics are pretty comparable in amplitude, and having YIG filter march up couple gigs is not impossible.
Thanks,
Calvin
|
Shall I repost this in the Tekscopes group for the OP?
I'd need an email contact.
Ancel
|
Re: parts units: front castings, was Re: need Bill West switches
I may be able to help with the 8566 front.
I will know later in the week.
Do you just need the front frame or the overlays / inserts also?
Glenn
toggle quoted message
Show quoted text
On 10/24/2017 2:15 PM, Dave McGuire Mcguire@... [hp_agilent_equipment] wrote: On 10/24/2017 01:52 AM, 'Tom Miller' tmiller11147@...
[hp_agilent_equipment] wrote:
There are millions of those switches just waiting to be harvested from
parts units. Where are you located? I can send you a few. Speaking of parts units, I'm looking for two front castings for System
II enclosures, one (for an 8566B), and one 8.5" (for a 3562A). Does
anyone have either of these available for purchase?
Thanks,
-Dave
--
-----------------------------------------------------------------------
Glenn Little ETCS(SS) USN Ret, ARRL Technical Specialist, SBE ARRL TAPR
Amateur Callsign: WB4UIV wb4uiv@... AMSAT LM 2178
QTH: Goose Creek, SC USA (EM92xx) USSVI, FRA, NRA LM QCWA LM 28417
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"
---------------------------------------------------------------------------
|
Re: need Bill West switches
that would be 7 miles to here.
drop me a email please
alan
near
waltzingbear point com
|
F1CHF
bownes
Dave McGuire