Re: Hints on removing burned tantalum residue
Hi.
Re:-
Not having the Aeroflex 3416 MESFET data sheets? nor the signal
generator schematics is difficult.
The Areoflex MESFET's are very HOT all the time, with no Rf output
of any kind.
I will try to trace out the circuit.
I think those devices may need -ve Gate bias to run correctly, so
you might want to check that, and if missing, find out where it
should have come from.
It seems that MESFET and GASFET devices are similar, and I do
know that power GASFET's most certainly need a -ve bias to run
correctly, plus that is often implemented these days, within an
automatic bias and protection scheme, so that if the -ve bias
source fails, the +ve power source for the Drain is disconnected,
preventing device damage or distruction of the 'FET's.
Hope something helps.
Dave B
G0WBX
--
Created on and sent from a Unix like PC running and using free and open source software:
|
Re: Do ManualsPlus still exist
They pulled the plug about 4 years ago
Dave
manuals@...
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On 4/18/2020 6:46 AM, Paul Bicknell wrote: Hi all just ?a quick question
Do ManualsPlus?still exist ?as the last?information?I have is
ManualsPlus Inventory as of 12/23/14
email to sales@...
and i would like an ?up to date listing as interested in some of his manuals
Regards Paul
-- Dave Manuals@... www.ArtekManuals.com
--
This email has been checked for viruses by Avast antivirus software.
|
Do ManualsPlus still exist
Hi all just ?a quick question ? Do ? ManualsPlus?still exist ?as the last?information?I have is?
| ManualsPlus Inventory as of 12/23/14 |
| email to sales@... |
and i would like an ?up to date listing as interested in some of his manuals? Regards Paul?
|
Hi all
?
Warning the 70900 a low / changing the
battery ?will loose its program and a lot are not available ?
?
I will be soldering another battery in parallel
on flying leads before removing the original
?
Before the present issues I was on the
hunt for the original make as used by HP as they are considered the best
?
Also there are at lest 2 types used? ones
with axial leads? at each ends?
The other without leads for the 70004
display
?
Regards Paul
?
I guess I need to get a bunch then as I have 4 of the 5 and multiple
instances of some. ?
I am thinking the 70206 probably has one also?
?I see Digi-Key has them but can¡¯t ship to Canada. :-(
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On Apr 17, 2020, at 9:27
PM, David & Laura <davidandlaura@...> wrote:
?
Off the top of my head, the following modules have batteries:
70700A Digitizer (WARNING - disconnecting the battery causes program
loss)
I think the optical spectrum analyzer modules have batteries too, but
I've never looked inside one of those.
Lots of manuals are online here:?
?
On Fri, Apr 17, 2020 at 9:21 PM Dave Miller <ve7hr@...> wrote:
Now that is ugly :-(
A question.
I am guessing that is the battery that is in the 70000 modules.
Does some one have a quick reference to where they are located and which
modules have them?
I am thinking I should change out mine.
I have a good collection of modules.
Thanks
Dave
VE7HR
> On Apr 17, 2020, at 9:17 PM, Dave McGuire <mcguire@...>
wrote:
>
> ?On 4/18/20 12:10 AM, David & Laura wrote:
>> Went to pull a 70205A system display module off the shelf to install
in
>> a 70001A, and found the following surprise:
>>
>> Evidently the module has (had) a TL-5104 3.6 Volt Lithium battery
behind
>> that door, though I've never seen corrosion look like this before...
>
>? Wow.? THAT is what I call a mess!? I've never seen an Li
cell go like
> that before either.? I wonder if someone put something else in there.
>
>? ? ? ? ? -Dave
>
> --
> Dave McGuire, AK4HZ
> New Kensington, PA
>
>
>
No virus found in this message.
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|
Re: HP 652A Dial Calibration
DON'T bend the tabs, no matter how desperate you get. I once had an HRO receiver where a previous owner had bent the tabs to get perfect tracking at the 50 kHz calibration marker frequencies. Unfortunately, the tabs now looked like the edge of a saw, and the freq was more than 10 kHz off between some of the 50 kHz steps.
Bending the plates in the 652A would be worse, as the three sections of the tuning cap C1 should track each other. I would suspect an imbalance would cause the amplitude to vary with frequency more than allowable.
John
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Show quoted text
On 4/17/2020 9:51 AM, n4buq wrote: After having the lubrication sieze the dial mechanism so tightly I could hardly move the dial on my 652A, I disassembled, cleaned, relubricated, and reassembled the entire mechanism. Naturally, I lost what synchronization the dial had with the tuning capacitor so I performed the dial calibration steps in the manual.
In the X10 range, I was able to get the endpoints virtually spot on; however, some of the integer points on the dial do not track within the tolerances given in the table in the manual. Oddly, at "10", the frequency is almost exactly 10.000; however, at "9", the accuracy deviates rather noticeably (maybe still in calibration but well more than I'd expect) and at many of the midpoints, it is out of tolerance.
While the manual gives the acceptable deviation values at various points on the dial, I'm not seeing anything that states what to do if those don't meet the specification. I know this subject has come up with regards to other signal generators (e.g. the 606, etc.) and "bending the fins" or "slipping the dial" have been suggested as possible solutions. Given that the manual already covers the proper method of slipping the dial (to get the end points set), I'm not sure that would apply here and I really, really hesitate to get into fin-bending as this cap has somewhat smaller fins than, say, the ones in a 606.
Anyone familiar with this and maybe have some suggestions as to fix it?
Thanks,
Barry - N4BUQ
|
I guess I need to get a bunch then as I have 4 of the 5 and multiple instances of some. ? I am thinking the 70206 probably has one also? ?I see Digi-Key has them but can¡¯t ship to Canada. :-( Thanks Dave
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Show quoted text
On Apr 17, 2020, at 9:27 PM, David & Laura <davidandlaura@...> wrote:
? Off the top of my head, the following modules have batteries:
70004A Display 70100A Power Meter 70205A Display 70700A Digitizer (WARNING - disconnecting the battery causes program loss) 70900A/B LO
I think the optical spectrum analyzer modules have batteries too, but I've never looked inside one of those.
Lots of manuals are online here:?
Thanks,
David Slik VE7FIM On Fri, Apr 17, 2020 at 9:21 PM Dave Miller < ve7hr@...> wrote: Now that is ugly :-(
A question.
I am guessing that is the battery that is in the 70000 modules.
Does some one have a quick reference to where they are located and which modules have them?
I am thinking I should change out mine.
I have a good collection of modules.
Thanks
Dave
VE7HR
> On Apr 17, 2020, at 9:17 PM, Dave McGuire <mcguire@...> wrote:
>
> ?On 4/18/20 12:10 AM, David & Laura wrote:
>> Went to pull a 70205A system display module off the shelf to install in
>> a 70001A, and found the following surprise:
>>
>> Evidently the module has (had) a TL-5104 3.6 Volt Lithium battery behind
>> that door, though I've never seen corrosion look like this before...
>
>? Wow.? THAT is what I call a mess!? I've never seen an Li cell go like
> that before either.? I wonder if someone put something else in there.
>
>? ? ? ? ? -Dave
>
> --
> Dave McGuire, AK4HZ
> New Kensington, PA
>
>
>
|
Off the top of my head, the following modules have batteries:
70004A Display 70100A Power Meter 70205A Display 70700A Digitizer (WARNING - disconnecting the battery causes program loss) 70900A/B LO
I think the optical spectrum analyzer modules have batteries too, but I've never looked inside one of those.
Lots of manuals are online here:?
Thanks,
David Slik VE7FIM
On Fri, Apr 17, 2020 at 9:21 PM Dave Miller < ve7hr@...> wrote: Now that is ugly :-(
A question.
I am guessing that is the battery that is in the 70000 modules.
Does some one have a quick reference to where they are located and which modules have them?
I am thinking I should change out mine.
I have a good collection of modules.
Thanks
Dave
VE7HR
> On Apr 17, 2020, at 9:17 PM, Dave McGuire <mcguire@...> wrote:
>
> ?On 4/18/20 12:10 AM, David & Laura wrote:
>> Went to pull a 70205A system display module off the shelf to install in
>> a 70001A, and found the following surprise:
>>
>> Evidently the module has (had) a TL-5104 3.6 Volt Lithium battery behind
>> that door, though I've never seen corrosion look like this before...
>
>? Wow.? THAT is what I call a mess!? I've never seen an Li cell go like
> that before either.? I wonder if someone put something else in there.
>
>? ? ? ? ? -Dave
>
> --
> Dave McGuire, AK4HZ
> New Kensington, PA
>
>
>
|
Now that is ugly :-(
A question.
I am guessing that is the battery that is in the 70000 modules.
Does some one have a quick reference to where they are located and which modules have them?
I am thinking I should change out mine.
I have a good collection of modules.
Thanks
Dave
VE7HR
toggle quoted message
Show quoted text
On Apr 17, 2020, at 9:17 PM, Dave McGuire <mcguire@...> wrote:
?On 4/18/20 12:10 AM, David & Laura wrote:
Went to pull a 70205A system display module off the shelf to install in
a 70001A, and found the following surprise:
Evidently the module has (had) a TL-5104 3.6 Volt Lithium battery behind
that door, though I've never seen corrosion look like this before... Wow. THAT is what I call a mess! I've never seen an Li cell go like
that before either. I wonder if someone put something else in there.
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
|
On 4/18/20 12:10 AM, David & Laura wrote: Went to pull a 70205A system display module off the shelf to install in
a 70001A, and found the following surprise:
Evidently the module has (had) a?TL-5104 3.6 Volt Lithium battery behind
that door, though I've never seen corrosion?look like this before... Wow. THAT is what I call a mess! I've never seen an Li cell go like that before either. I wonder if someone put something else in there. -Dave -- Dave McGuire, AK4HZ New Kensington, PA
|
Went to pull a 70205A system display module off the shelf to install in a 70001A, and found the following surprise:
Evidently the module has (had) a?TL-5104 3.6 Volt Lithium battery behind that door, though I've never seen corrosion?look like this before...
Thanks,
David?Slik VE7FIM
|
Re: Hints on removing burned tantalum residue
I thought you did have the datasheet for the HexaWave HWF1681RA MESFET - I found it right away. With that, you can tell which pin is the gate, and also approximately the desired operating conditions. Assuming you can run the circuit opened up, you can measure the gate DC bias via a small resistance like a few k ohms in series with a DVM lead. It can be clipped to the test lead, or temporarily tacked onto the gate node - but not right at the MESFET - find a run or part going to the gate lead. These are pretty high-powered MESFETs, so it's most likely the sources are grounded, and it needs negative gate bias.
You should measure something around -1 to -3 volts DC on the gate if the bias supply and circuit are working right. If it's near zero volts or slightly positive, then the negative supply or bias control circuit aren't working, or the MESFET channel has melted down and taken the gate with it. This last scenario can be checked by measuring the resistance of the gate to ground, with the circuit unpowered. If it's extremely low like what you measured at the drain, then it's likely a goner.
Good luck
Ed
|
Re: Advantest R3767BH VNA date+time setting
Yeah, it was a long shot.
Jim
Sent from my Verizon, Samsung Galaxy smartphone
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-------- Original message -------- From: Jesse Lackey <jesse@...> Date: 4/17/20 10:18 AM (GMT-08:00) Subject: Re: [HP-Agilent-Keysight-equipment] Advantest R3767BH VNA date+time setting
Hi Dave and Jim, thanks for the emails.? I do have the R3767BH manual, what you sent Jim was for what I assume the slightly more recent "G" version.? Thanks anyway.? Alas no info gleaned from a scan of it. And Dave I had no idea, thank you!!! Much appreciated all who took a moment to write. J Dave Emery wrote: > On Fri, Apr 17, 2020 at 02:58:01AM +0000, Jim Ford wrote: > > Are you guys familiar with the existance of > [email protected] ? > > There is a community of folks there who might help... > > > > > > >> Hi, Jesse. >> >> A friend has a similar VNA, and for some reason I have the manual.? I >> didn't see anything in the index about setting the time and date, but I >> could have missed it.? Here's a .pdf if you don't already have it. >> >> HTH. >> >> Jim Ford >> >> ------ Original Message ------ >> From: "Jesse Lackey" <jesse@...> >> To: [email protected]>> Sent: 4/16/2020 5:06:24 PM >> Subject: Re: [HP-Agilent-Keysight-equipment] Advantest R3767BH VNA >> date+time setting >> >>> Hi Stan, there isn't an enter key, but there is X1.? No dice, it is still >>> Jan 1 1970.? Tx for the thought tho! >>> >>> J >>> >>> >>> Stan wrote: >>>> Hi Jesse, >>>> >>>> Although I'm not familiar with your particular VNA, I've found with a lot >>>> of T&M gear that when setting the date, time, or any other numeric entry, >>>> you need to press the Enter key or its equivalent (e.g., Hz, x1, etc.) >>>> after you key in the new value. Otherwise, the value will not be updated. >>>> >>>> Regards, >>>> Stan >>>> >>> >>> >>> >> >> >> > > >
|
Re: Hints on removing burned tantalum residue
hi Ed,
Thank you for your thoughtful and valid suggestions !
Sometime,? If you find more info on your? ?NEC --800x devices that you mentioned, I would appreciate that !!?
Not having the Aeroflex 3416 MESFET data sheets? nor the signal generator schematics is difficult.
The Areoflex MESFET's are very HOT all the time, with no Rf output of any kind.
I will try to trace out the circuit.
thank you,
rick
|
Re: HP8562A Errors 304,335,317,333
Hello It can work stand alone. I have had failures in the PSU in a 180uF capacitor. It was a blue one. It was open and leaked alittle. If you need i Can find a psu and point to it. The cap was open and the 28v was absent.
PSU is taken out from the top side all 4 pcb must be folded out and below the alu cover is the PSU.
best regards Peter
Would Like to say Good news but?
?
Managed to get the Analyser on the bench today for a quick check and looks as if 28Volts not there.
?
Also getting that smell of Burning rubber so worried could be causing more damage and need to isolate the source and start diagnosing supply.
?
Can the PSU work standalone, or is it load conscious?
?
Stu.
?
?
?
?
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From: [email protected] <[email protected]>
On Behalf Of Peter Hansen
Sent: 17 April 2020 09:51
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP8562A Errors 304,335,317,333
?
hello Stu if you look on A2 on the side you see the LEDs for the PSU. All should be LIT. I am sure this is not a PSU issue.
If you work through the 300/600Mhz chain with an osilloscope you can check where the signal dissapears. I remember the 600Mhz is made in a doubler and if signal is too small you have not enough for doubling to 600Mhz.
Peter,
?
Ok from schematic I can see the 600MHz Oscillator
¨¤ Buffer ¨¤ /2 = 300Mhz
¨¤ Offset Loop Buffer. Is that correct?
Is it the /2 device your talking about? The whole board seems to be a 600Mhz PLL with 10Mhz ref at source.
Correct me if I¡¯m wrong.
?
I still think something burn¡¯t out although th PSU looks clean.
Just prepping up before getting My hands dirty..
?
Stu.
?
?
Hello Stu I must correct my self. The 8562A is before use og MMIC. area is still the same. It is just discrete amplifiers. Order a schematics from Artic media ant look for Radio Frequency module look in the page with
the generation of 300/600Mhz.
Reason why you can?t measure anything is because the 600Mhz is used for third mixer.
Peter,
?
Which board are we talking about ?
Still looking for the LED PSU indicators on the A2 card.
?
Presume you are referring RF board..?
Is this an off the shelf part or HP proprietary?
?
Thanks,
?
Stu.
?
?
Hello Group a TAM is not needed in this case. It is simply a MMIC in the 300/600Mhz chain that is bad.
I believe Harke has a Hp85629A TAM for sale.
best regards Peter Hansen
I suspect you might be able to rent the TAM from one of the ETE rental outfits for a month or so for not a horrible price.? I believe that Tam Hanna has one or two for sale, I may purchase one from him for my own use with my 8562A.
Don Bitters
|
Re: Wanted operator serves manual for HP 8402B
It's already sold. Did someone from this group buy it maybe?
Szabolcs Szabolcs Szigeti via <szigiszabolcs= [email protected]> ezt ¨ªrta (id?pont: 2020. ¨¢pr. 17., P¨¦n 13:56):
Hi,
There is one on eBay, unfortunately the overseas postage makes it
quite expensive. Maybe someone in the US is willing to buy and have it
scanned. I'm sure some of us would be willing to contribute to it.
Szabolcs
Paul Bicknell <paul@...> ezt ¨ªrta (id?pont: 2020. ¨¢pr.
17., P, 0:58):
>
>
>
> Hi all
>
>
>
> Looking for? operator serves manual for HP 8402B
>
>
>
> Unfortunately Dave at Artek dues not have it
>
>
>
> Regards Paul;? ~England
>
>
|
Re: Calibrate a 431c with 8477a?
Hi,
Thanks everyone for the responses, turns out I was able to buy a 8492b on eBay. The seller is actually on this list, so I'd like to thank in public his willingness to accept my offer and already ship the unit. Hopefully it will arrive soon from the other side of the ocean.
Szabolcs Szabolcs Szigeti via <szigiszabolcs= [email protected]> ezt ¨ªrta (id?pont: 2020. ¨¢pr. 16., Cs¨¹ 22:05):
Hi,
Is it possible to calibrate a 431C power meter with a 8477A or do I need a 8402A for this?
Thanks.
Szabolcs
|
Re: HP 652A Dial Calibration
Make that "In the X1K range" where I could get the endpoints correct. That's the range specified for initial dial calibration.
Thanks,
Barry - N4BUQ
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----- Original Message ----- From: "n4buq" <n4buq@...>
To: [email protected]
Sent: Friday, April 17, 2020 11:51:08 AM
Subject: [HP-Agilent-Keysight-equipment] HP 652A Dial Calibration
After having the lubrication sieze the dial mechanism so tightly I could
hardly move the dial on my 652A, I disassembled, cleaned, relubricated, and
reassembled the entire mechanism. Naturally, I lost what synchronization
the dial had with the tuning capacitor so I performed the dial calibration
steps in the manual.
In the X10 range, I was able to get the endpoints virtually spot on; however,
some of the integer points on the dial do not track within the tolerances
given in the table in the manual. Oddly, at "10", the frequency is almost
exactly 10.000; however, at "9", the accuracy deviates rather noticeably
(maybe still in calibration but well more than I'd expect) and at many of
the midpoints, it is out of tolerance.
While the manual gives the acceptable deviation values at various points on
the dial, I'm not seeing anything that states what to do if those don't meet
the specification. I know this subject has come up with regards to other
signal generators (e.g. the 606, etc.) and "bending the fins" or "slipping
the dial" have been suggested as possible solutions. Given that the manual
already covers the proper method of slipping the dial (to get the end points
set), I'm not sure that would apply here and I really, really hesitate to
get into fin-bending as this cap has somewhat smaller fins than, say, the
ones in a 606.
Anyone familiar with this and maybe have some suggestions as to fix it?
Thanks,
Barry - N4BUQ
|
Re: Advantest R3767BH VNA date+time setting
Hi Dave and Jim, thanks for the emails. I do have the R3767BH manual, what you sent Jim was for what I assume the slightly more recent "G" version. Thanks anyway. Alas no info gleaned from a scan of it.
And Dave I had no idea, thank you!!!
Much appreciated all who took a moment to write.
J
Dave Emery wrote:
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Show quoted text
On Fri, Apr 17, 2020 at 02:58:01AM +0000, Jim Ford wrote:
Are you guys familiar with the existance of
[email protected] ?
There is a community of folks there who might help...
Hi, Jesse.
A friend has a similar VNA, and for some reason I have the manual. I
didn't see anything in the index about setting the time and date, but I
could have missed it. Here's a .pdf if you don't already have it.
HTH.
Jim Ford
------ Original Message ------
From: "Jesse Lackey" <jesse@...>
To: [email protected]
Sent: 4/16/2020 5:06:24 PM
Subject: Re: [HP-Agilent-Keysight-equipment] Advantest R3767BH VNA
date+time setting
Hi Stan, there isn't an enter key, but there is X1. No dice, it is still
Jan 1 1970. Tx for the thought tho!
J
Stan wrote:
Hi Jesse,
Although I'm not familiar with your particular VNA, I've found with a lot
of T&M gear that when setting the date, time, or any other numeric entry,
you need to press the Enter key or its equivalent (e.g., Hz, x1, etc.)
after you key in the new value. Otherwise, the value will not be updated.
Regards,
Stan
|
After having the lubrication sieze the dial mechanism so tightly I could hardly move the dial on my 652A, I disassembled, cleaned, relubricated, and reassembled the entire mechanism. Naturally, I lost what synchronization the dial had with the tuning capacitor so I performed the dial calibration steps in the manual.
In the X10 range, I was able to get the endpoints virtually spot on; however, some of the integer points on the dial do not track within the tolerances given in the table in the manual. Oddly, at "10", the frequency is almost exactly 10.000; however, at "9", the accuracy deviates rather noticeably (maybe still in calibration but well more than I'd expect) and at many of the midpoints, it is out of tolerance.
While the manual gives the acceptable deviation values at various points on the dial, I'm not seeing anything that states what to do if those don't meet the specification. I know this subject has come up with regards to other signal generators (e.g. the 606, etc.) and "bending the fins" or "slipping the dial" have been suggested as possible solutions. Given that the manual already covers the proper method of slipping the dial (to get the end points set), I'm not sure that would apply here and I really, really hesitate to get into fin-bending as this cap has somewhat smaller fins than, say, the ones in a 606.
Anyone familiar with this and maybe have some suggestions as to fix it?
Thanks,
Barry - N4BUQ
|
Re: Test Equipment For Sale
Hello Bob,
Sorry, I do not have that unit anymore.? I am in Los Angeles, Can.
Thanks, Michael
Hi Michael,
Do you still have the HP8560E and if so, where are you located?
Thanks,
BobH
|
Paul Bicknell
Dave McGuire