Re: HP displays, was Re: [HP-Agilent-Keysight-equipment] New STUFF added
On 9/17/22 10:00 PM, Dave McGuire wrote: On 9/17/22 16:06, Jeff Woolsey wrote:
I see HP LED displays on your page, but not what I'm looking for.? I'll bet that you do not have 1990-0335 nor 5082-7405 (-7415 will do in a pinch) nor 5082-7466 (looks same, different pinout?, also in a pinch) ? I'm pretty sure I've located a 5082-7415, or at least a display that's very close.? Strangely, in Radio Shack packaging:
?
? The pinout and general characteristics are the same as the HP 5082-7415, the back of the card says "TYPE 5082", and Tandy was selling displays from HP, Monsanto, National Semiconductor, and just about all of the other LED manufacturers back then.
???????????? -Dave
No wonder I can't find them.? They're OEMed.?? That one plus delivery is a tad more than what I paid for a genuine 1990-0355 sealed in its original bag, shipping included, this week.? Unless they honor the marked price... The presence of RS packaging for one of these lends credence to my belief that I bought a couple of these (and maybe some of the others you mentio n) way back then, but I cannot find them now, even though I still have the boxes I thought I put them in back then.? They're probably hiding with everything else I can't find (like my roll of auto-reverse tape for tape reels, most recently). -- Jeff Woolsey {{woolsey,jlw}@jlw,first.last@{gmail,jlw}}.com Nature abhors straight antennas, clean lenses, and empty storage. "Delete! Delete! OK!" -Dr. Bronner on disk space management Card-sorting, Joel. -Crow on solitaire
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Re: Pozidrive screws on HP covers
Reed and Prince is NOT the same as POZI.? Reed and Prince is also known as Frearson.? From a web article about Frearson:? "Also known as the Reed and Prince, this screwdriver is similar to a Phillips but with a cross shape. Frearson bits accommodate all Frearson screws, regardless of size. The Frearson head is tapered to a sharp point, which allows for higher applied torque than the rounded-tip Phillips".
POZI drivers are blunted at the end and do not come to a point.? in the attached photo the bottom driver is a Craftsman 1/4" Reed and Prince.? Note the pointed end.? The top is a Stanley #2 POZI driver that was actually used in production at Loveland HP.? Reed and Prince drivers have 4 flutes that have parallel sides on each and do not taper down toward the center like Phillips, ie: the cross has no taper.? There are different angles involved as well.? The point keeps an Reed and Prince from fully engaging a POZI screw correctly and it will damage the screw head and the driver.? There were few Phillips screw drivers at HP and I don't know that I ever saw a Reed and Prince there other than in Facilities Maintenance.? I do think a Reed and Prince with the point blunted would work in a POZI better than a Phillips but is still not the correct driver.? If you have the right driver for a screw you can hold the driver horizontal and place the screw on the driver.? Then moving the driver up and down while horizontal the screw will not fall off.? If it does you have a worn screw, worn driver, or the wrong driver!? The differences are often subtle, but can cause much frustration and damaged hardware.
Clay Scott
|
Yes, be sure to trace signals along the path to the output. Attenuators often take a beating; try different settings to see if only some are dead. Also, I've encountered a few pieces of hardline that were nicked at the factory so that ordinary handling causes the center conductor to break. Simple to find in a standard tracing exercise or continuity check.
Good luck!
Tom
--
Prof. Thomas H. Lee
Allen Ctr., Rm. 205
350 Jane Stanford Way
Stanford University
Stanford, CA 94305-4070
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On 9/17/2022 22:30, Bruce wrote: Could Be the attenuator -check the output at the hardline comming out of the RF unit.? BE CAREFULL, the output can be quite high - +15 dBm.
Cheers!
Bruce
Quoting Radu Bogdan Dicher <vondicher@...>:
Bruce,
Thank you for pitching in.
Yes, upon restarting the unit, it goes to 1MHz and -86.98dBm
amplitude, which I think is default. Everything display-wise seems perfect.
Except maybe the issue of no buffer time to allow the LO to reach
temperature, which I find odd. Maybe the LO is offline? Which may explain
no sinewave at output.
I reconnected by hand the rigid line. Not sure if properly, as I don't have
a brass-torqued SMD wrench. I assume the worst that can happen with that is
a non-leveled output, but not missing altogether. Not knowing more on the
history of the unit, I assume maybe my handling of the shielded modules may
have severed the signal path somehow. Though I generally have a very soft
and overly planned touch, if anything, so maybe the history of the unit is
the issue. I dunno.
I will be looking into examining the signal path for any potential
interruptions. Given the history of the unit I tend to think it should come
back online within spec, but that's not what we're seeing here.
Radu.
On Sat, Sep 17, 2022 at 9:25 PM Bruce <bruce@...> wrote:
Do you know at power up the output is ~ -80dBm - try setting the
amplatude to 0dBm and be sure you reconnected the hardline from the RF
unit to the attenuator.? Any front panel diagnostics lit ???
Cheers!
Bruce
Quoting Tom Lee <tomlee@...>:
Great news, indeed. Keep going, Radu!
-- Cheers,
Tom
--
Prof. Thomas H. Lee
Allen Ctr., Rm. 205
350 Jane Stanford Way
Stanford University
Stanford, CA 94305-4070
On 9/17/2022 20:27, Radu Bogdan Dicher wrote:
Great news, folks.
After finding out both A15CR1 and CR2 were shorted, I replaced them
with 1N4003s, and all rails are now coming online in spec (while
having the board out, I also replaced all 10uF caps). Now the +15V
is just a hair off at 14.987V (should be within 0.01V of 15V), but
I can't imagine that's a huge deal.
However, I don't seem to see any signal coming out of it. Learning
how to use it, so take that with a grain of salt.
Radu.
On Sat, Sep 17, 2022 at 6:54 PM Radu Bogdan Dicher via groups.io
<> <vondicher@...> wrote:
??? Well, after finally taking this apart (I'd post pictures, but I am
??? a bit ptsd'ed...) I have two shorted diodes on A15 - CR1 and CR2.
??? I am thinking vanilla 1N4148 would be OK in this position -
thoughts?
??? Thank you,
??? Radu.
??? On Sat, Sep 17, 2022 at 5:30 PM Radu Bogdan Dicher via groups.io
??? <> <vondicher@...> wrote:
??????? Raymond, Clay,
??????? You both sort of got beat by a hair with the 4 youtube videos
??????? Clay is talking about. Must be this:
??????? .
??????? And yes, I take back my statement on the overall assembly
??????? design of this unit. I didn't know there's just one SMA
??????? connecting the shielded modules (there's actually several in
??????? my unit as to, I think, the youtube sample, but they're not
??????? rigid lines), but overall, it's a breeze to take apart (once
??????? you know what the correct path is).
??????? Thank you both! On to the work for me.
??????? Radu.
??????? On Sat, Sep 17, 2022 at 4:42 PM Raymond Domp Frank
??????? <hewpatek@...> wrote:
??????????? On Sun, Sep 18, 2022 at 01:22 AM, freshndaire wrote:
??????????????? I would not call this unit hard to service or a poor
??????????????? mechanical design.? Pull the big aluminum hunk and
you
??????????????? have lots of access!? The synthesizer module has 3
??????????????? long bolts holding it in.? Remove the SMA Semi-rigid
??????????????? coax cable from the module's backplane then pull
the 3
??????????????? screws in the middle and you can lift the synth
module
??????????????? and set it aside with the other cables plugged in
IIRC.
??????????? So my memory served me right!
??????????? Raymond
|
Re: Pozidriv screws on HP covers
Star drive and Torx are NOT the same.
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Show quoted text
-----Original Message----- From: [email protected] < [email protected]> On Behalf Of Dave McGuire Sent: 18 September 2022 05:44 To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] Pozidriv screws on HP covers On 9/17/22 22:23, saipan59 (Pete) wrote: Torx and square drive are the kings of readily available
high torque screws
Question: Is Torx and "star drive" the same thing? Perhaps the only
difference is that Torx is trademarked?? Yes. Look at the people who call Torx "star drive" with the same derision as you would the people who equate Phillips, PoziDriv, and JIS and call them all "crosspoints". -Dave -- Dave McGuire, AK4HZ New Kensington, PA
|
Could Be the attenuator -check the output at the hardline comming out of the RF unit. BE CAREFULL, the output can be quite high - +15 dBm.
Cheers!
Bruce
Quoting Radu Bogdan Dicher <vondicher@...>:
toggle quoted message
Show quoted text
Bruce,
Thank you for pitching in.
Yes, upon restarting the unit, it goes to 1MHz and -86.98dBm
amplitude, which I think is default. Everything display-wise seems perfect.
Except maybe the issue of no buffer time to allow the LO to reach
temperature, which I find odd. Maybe the LO is offline? Which may explain
no sinewave at output.
I reconnected by hand the rigid line. Not sure if properly, as I don't have
a brass-torqued SMD wrench. I assume the worst that can happen with that is
a non-leveled output, but not missing altogether. Not knowing more on the
history of the unit, I assume maybe my handling of the shielded modules may
have severed the signal path somehow. Though I generally have a very soft
and overly planned touch, if anything, so maybe the history of the unit is
the issue. I dunno.
I will be looking into examining the signal path for any potential
interruptions. Given the history of the unit I tend to think it should come
back online within spec, but that's not what we're seeing here.
Radu.
On Sat, Sep 17, 2022 at 9:25 PM Bruce <bruce@...> wrote:
Do you know at power up the output is ~ -80dBm - try setting the
amplatude to 0dBm and be sure you reconnected the hardline from the RF
unit to the attenuator. Any front panel diagnostics lit ???
Cheers!
Bruce
Quoting Tom Lee <tomlee@...>:
Great news, indeed. Keep going, Radu!
-- Cheers,
Tom
--
Prof. Thomas H. Lee
Allen Ctr., Rm. 205
350 Jane Stanford Way
Stanford University
Stanford, CA 94305-4070
On 9/17/2022 20:27, Radu Bogdan Dicher wrote:
Great news, folks.
After finding out both A15CR1 and CR2 were shorted, I replaced them
with 1N4003s, and all rails are now coming online in spec (while
having the board out, I also replaced all 10uF caps). Now the +15V
is just a hair off at 14.987V (should be within 0.01V of 15V), but
I can't imagine that's a huge deal.
However, I don't seem to see any signal coming out of it. Learning
how to use it, so take that with a grain of salt.
Radu.
On Sat, Sep 17, 2022 at 6:54 PM Radu Bogdan Dicher via groups.io
<> <vondicher@...> wrote:
Well, after finally taking this apart (I'd post pictures, but I am
a bit ptsd'ed...) I have two shorted diodes on A15 - CR1 and CR2.
I am thinking vanilla 1N4148 would be OK in this position - thoughts?
Thank you,
Radu.
On Sat, Sep 17, 2022 at 5:30 PM Radu Bogdan Dicher via groups.io
<> <vondicher@...> wrote:
Raymond, Clay,
You both sort of got beat by a hair with the 4 youtube videos
Clay is talking about. Must be this:
.
And yes, I take back my statement on the overall assembly
design of this unit. I didn't know there's just one SMA
connecting the shielded modules (there's actually several in
my unit as to, I think, the youtube sample, but they're not
rigid lines), but overall, it's a breeze to take apart (once
you know what the correct path is).
Thank you both! On to the work for me.
Radu.
On Sat, Sep 17, 2022 at 4:42 PM Raymond Domp Frank
<hewpatek@...> wrote:
On Sun, Sep 18, 2022 at 01:22 AM, freshndaire wrote:
I would not call this unit hard to service or a poor
mechanical design. Pull the big aluminum hunk and you
have lots of access! The synthesizer module has 3
long bolts holding it in. Remove the SMA Semi-rigid
coax cable from the module's backplane then pull the 3
screws in the middle and you can lift the synth module
and set it aside with the other cables plugged in IIRC.
So my memory served me right!
Raymond
|
Re: Looking for Agilent PNA old FW repo?
Hi all, I was looking for the first few revs to be specific:
PNA_A0425.msi? ? ? ? ??
PNA_A0407.msi? ? ? ? ? ?? ? ? ??
PNA_A0353.msi? ? ? ? ? ?
PNA_A0262.msi? ? ? ? ? ?
PNA_A0160.msi
My E8357A was running windows 2000 and PNA FW A01.40. The manual says not to skip major revisions, and I believe the latest FW I can run on this system is A04.25.?
Yup Caesar this is the PNA that I am still trying to get to boot. I may have a few more tricks up my sleeve before I totally give up on the 266 MHz cpu. No rush; enjoy your vacation!?
|
Re: E4982A Broken hard disk.
How did the hard drive fail? If it is an electrical failure on the digital board, you might be able to buy an identical hard drive and swap the board.
|
HP displays, was Re: [HP-Agilent-Keysight-equipment] New STUFF added
On 9/17/22 16:06, Jeff Woolsey wrote: I see HP LED displays on your page, but not what I'm looking for.? I'll bet that you do not have 1990-0335 nor 5082-7405 (-7415 will do in a pinch) nor 5082-7466 (looks same, different pinout?, also in a pinch) I'm pretty sure I've located a 5082-7415, or at least a display that's very close. Strangely, in Radio Shack packaging: The pinout and general characteristics are the same as the HP 5082-7415, the back of the card says "TYPE 5082", and Tandy was selling displays from HP, Monsanto, National Semiconductor, and just about all of the other LED manufacturers back then. -Dave -- Dave McGuire, AK4HZ New Kensington, PA
|
Thank you, Patricio, and thank you very much, Tom. Hopefully, my PS repair gets reflected soon in a fully functional unit.? I'm a bit disheartened, but I do very much appreciate your encouragement! Radu.?
On Sat, Sep 17, 2022 at 9:43 PM Radu Dicher < vondicher@...> wrote: Bruce, Thank you for pitching in.?
Yes, upon restarting the unit, it goes to 1MHz and -86.98dBm amplitude,?which I think is default. Everything display-wise seems perfect. Except maybe the issue of no?buffer time to?allow the LO to reach temperature, which I find odd. Maybe the LO is offline? Which may explain no sinewave at output.?
I reconnected by hand the rigid line. Not sure if properly, as I don't have a brass-torqued SMD wrench. I assume the worst that can happen with that is a non-leveled output, but not missing altogether. Not knowing more on the history of the unit, I assume maybe my handling of the shielded modules may have severed the signal path somehow. Though I generally?have a very soft and?overly planned touch, if anything, so maybe the history of the unit is the issue. I dunno.?
I will be looking into examining the signal path for any potential interruptions. Given the history of the unit I tend to think it should come back online?within spec,?but that's not what we're seeing here.? Radu.?
On Sat, Sep 17, 2022 at 9:25 PM Bruce < bruce@...> wrote: Do you know at power up the output is ~ -80dBm - try setting the?
amplatude to 0dBm and be sure you reconnected the hardline from the RF?
unit to the attenuator.? Any front panel diagnostics lit ???
Cheers!
Bruce
Quoting Tom Lee <tomlee@...>:
> Great news, indeed. Keep going, Radu!
>
> -- Cheers,
> Tom
>
> --
> Prof. Thomas H. Lee
> Allen Ctr., Rm. 205
> 350 Jane Stanford Way
> Stanford University
> Stanford, CA 94305-4070
>
>
> On 9/17/2022 20:27, Radu Bogdan Dicher wrote:
>> Great news, folks.
>>
>> After finding out both A15CR1 and CR2 were shorted, I replaced them?
>> with 1N4003s, and all rails are now coming online in spec?(while?
>> having the board out, I also replaced all 10uF caps). Now the?+15V?
>> is just a hair off at 14.987V (should be within 0.01V of 15V), but?
>> I can't imagine that's a huge deal.
>>
>> However, I don't seem to see any signal coming out of it. Learning?
>> how to use it, so take that with a grain of salt.
>> Radu.
>>
>> On Sat, Sep 17, 2022 at 6:54 PM Radu Bogdan Dicher via ?
>> <> <vondicher=[email protected]> wrote:
>>
>>? ? Well, after finally taking this apart (I'd post pictures, but I am
>>? ? a bit ptsd'ed...) I have two shorted diodes on A15 - CR1 and CR2.
>>? ? I am thinking vanilla 1N4148 would be OK in this position - thoughts?
>>? ? Thank you,
>>? ? Radu.
>>
>>? ? On Sat, Sep 17, 2022 at 5:30 PM Radu Bogdan Dicher via
>>? ? <> <vondicher=[email protected]> wrote:
>>
>>? ? ? ? Raymond, Clay,
>>? ? ? ? You both sort of got beat by a hair with the 4 youtube videos
>>? ? ? ? Clay is talking about. Must be this:
>>? ? ? ? .
>>
>>? ? ? ? And yes, I take back my statement on the overall assembly
>>? ? ? ? design of this unit. I didn't know there's just one SMA
>>? ? ? ? connecting?the shielded modules (there's actually several in
>>? ? ? ? my unit as to, I think, the youtube sample, but they're not
>>? ? ? ? rigid lines), but overall, it's a breeze to take apart (once
>>? ? ? ? you know what the correct path is).
>>
>>? ? ? ? Thank you both! On to the work for me.
>>? ? ? ? Radu.
>>
>>? ? ? ? On Sat, Sep 17, 2022 at 4:42 PM Raymond Domp Frank
>>? ? ? ? <hewpatek@...> wrote:
>>
>>? ? ? ? ? ? On Sun, Sep 18, 2022 at 01:22 AM, freshndaire wrote:
>>
>>? ? ? ? ? ? ? ? I would not call this unit hard to service or a poor
>>? ? ? ? ? ? ? ? mechanical design.? Pull the big aluminum hunk and you
>>? ? ? ? ? ? ? ? have lots of access!? The synthesizer module has 3
>>? ? ? ? ? ? ? ? long bolts holding it in.? Remove the SMA Semi-rigid
>>? ? ? ? ? ? ? ? coax cable from the module's backplane then pull the 3
>>? ? ? ? ? ? ? ? screws in the middle and you can lift the synth module
>>? ? ? ? ? ? ? ? and set it aside with the other cables plugged in IIRC.
>>
>>? ? ? ? ? ? So my memory served me right!
>>
>>? ? ? ? ? ? Raymond
>
>
>
|
Re: Pozidriv screws on HP covers
On 9/17/22 22:23, saipan59 (Pete) wrote: Torx and square drive are the kings of readily available
high torque screws
Question: Is Torx and "star drive" the same thing? Perhaps the only difference is that Torx is trademarked?? Yes. Look at the people who call Torx "star drive" with the same derision as you would the people who equate Phillips, PoziDriv, and JIS and call them all "crosspoints". -Dave -- Dave McGuire, AK4HZ New Kensington, PA
|
Bruce, Thank you for pitching in.?
Yes, upon restarting the unit, it goes to 1MHz and -86.98dBm amplitude,?which I think is default. Everything display-wise seems perfect. Except maybe the issue of no?buffer time to?allow the LO to reach temperature, which I find odd. Maybe the LO is offline? Which may explain no sinewave at output.?
I reconnected by hand the rigid line. Not sure if properly, as I don't have a brass-torqued SMD wrench. I assume the worst that can happen with that is a non-leveled output, but not missing altogether. Not knowing more on the history of the unit, I assume maybe my handling of the shielded modules may have severed the signal path somehow. Though I generally?have a very soft and?overly planned touch, if anything, so maybe the history of the unit is the issue. I dunno.?
I will be looking into examining the signal path for any potential interruptions. Given the history of the unit I tend to think it should come back online?within spec,?but that's not what we're seeing here.? Radu.?
On Sat, Sep 17, 2022 at 9:25 PM Bruce < bruce@...> wrote: Do you know at power up the output is ~ -80dBm - try setting the?
amplatude to 0dBm and be sure you reconnected the hardline from the RF?
unit to the attenuator.? Any front panel diagnostics lit ???
Cheers!
Bruce
Quoting Tom Lee <tomlee@...>:
> Great news, indeed. Keep going, Radu!
>
> -- Cheers,
> Tom
>
> --
> Prof. Thomas H. Lee
> Allen Ctr., Rm. 205
> 350 Jane Stanford Way
> Stanford University
> Stanford, CA 94305-4070
>
>
> On 9/17/2022 20:27, Radu Bogdan Dicher wrote:
>> Great news, folks.
>>
>> After finding out both A15CR1 and CR2 were shorted, I replaced them?
>> with 1N4003s, and all rails are now coming online in spec?(while?
>> having the board out, I also replaced all 10uF caps). Now the?+15V?
>> is just a hair off at 14.987V (should be within 0.01V of 15V), but?
>> I can't imagine that's a huge deal.
>>
>> However, I don't seem to see any signal coming out of it. Learning?
>> how to use it, so take that with a grain of salt.
>> Radu.
>>
>> On Sat, Sep 17, 2022 at 6:54 PM Radu Bogdan Dicher via ?
>> <> <vondicher=[email protected]> wrote:
>>
>>? ? Well, after finally taking this apart (I'd post pictures, but I am
>>? ? a bit ptsd'ed...) I have two shorted diodes on A15 - CR1 and CR2.
>>? ? I am thinking vanilla 1N4148 would be OK in this position - thoughts?
>>? ? Thank you,
>>? ? Radu.
>>
>>? ? On Sat, Sep 17, 2022 at 5:30 PM Radu Bogdan Dicher via
>>? ? <> <vondicher=[email protected]> wrote:
>>
>>? ? ? ? Raymond, Clay,
>>? ? ? ? You both sort of got beat by a hair with the 4 youtube videos
>>? ? ? ? Clay is talking about. Must be this:
>>? ? ? ? .
>>
>>? ? ? ? And yes, I take back my statement on the overall assembly
>>? ? ? ? design of this unit. I didn't know there's just one SMA
>>? ? ? ? connecting?the shielded modules (there's actually several in
>>? ? ? ? my unit as to, I think, the youtube sample, but they're not
>>? ? ? ? rigid lines), but overall, it's a breeze to take apart (once
>>? ? ? ? you know what the correct path is).
>>
>>? ? ? ? Thank you both! On to the work for me.
>>? ? ? ? Radu.
>>
>>? ? ? ? On Sat, Sep 17, 2022 at 4:42 PM Raymond Domp Frank
>>? ? ? ? <hewpatek@...> wrote:
>>
>>? ? ? ? ? ? On Sun, Sep 18, 2022 at 01:22 AM, freshndaire wrote:
>>
>>? ? ? ? ? ? ? ? I would not call this unit hard to service or a poor
>>? ? ? ? ? ? ? ? mechanical design.? Pull the big aluminum hunk and you
>>? ? ? ? ? ? ? ? have lots of access!? The synthesizer module has 3
>>? ? ? ? ? ? ? ? long bolts holding it in.? Remove the SMA Semi-rigid
>>? ? ? ? ? ? ? ? coax cable from the module's backplane then pull the 3
>>? ? ? ? ? ? ? ? screws in the middle and you can lift the synth module
>>? ? ? ? ? ? ? ? and set it aside with the other cables plugged in IIRC.
>>
>>? ? ? ? ? ? So my memory served me right!
>>
>>? ? ? ? ? ? Raymond
>
>
>
|
Great News !!? Ing. Patricio A. GrecoTaller Aeron¨¢utico de Reparaci¨®n 1B-349Organizaci¨®n de Mantenimiento Aeron¨¢utico de la Defensa OMAD-001Gral. Mart¨ªn Rodr¨ªguez 2159San Miguel (1663)Buenos AiresT:?+5411-4455-2557F:?+5411-4032-0072
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Show quoted text
On 18 Sep 2022, at 00:27, Radu Bogdan Dicher <vondicher@...> wrote:
? Great news, folks.?
After finding out both A15CR1 and CR2 were shorted, I replaced them with 1N4003s, and all rails are now coming online in spec?(while having the board out, I also replaced all 10uF caps). Now the?+15V is just a hair off at 14.987V (should be within 0.01V of 15V), but I can't imagine that's a huge deal.? However, I don't seem to see any signal coming out of it. Learning how to use it, so take that with a grain of salt.? Radu.? On Sat, Sep 17, 2022 at 6:54 PM Radu Bogdan Dicher via <vondicher= [email protected]> wrote: Well, after finally taking this apart (I'd post pictures, but I am a bit ptsd'ed...) I have two shorted diodes on A15 - CR1 and CR2.? I am thinking vanilla 1N4148 would be OK in this position - thoughts?? Thank you, Radu.?
On Sat, Sep 17, 2022 at 5:30 PM Radu Bogdan Dicher via <vondicher= [email protected]> wrote: Raymond, Clay, You both sort of got beat by a hair with the 4 youtube videos Clay is talking about. Must be this:?.?
And yes, I take back my statement on the overall assembly design of this unit. I didn't know there's just one SMA connecting?the shielded modules (there's actually several in my unit as to, I think, the youtube sample, but they're not rigid lines), but overall, it's a breeze to take apart (once you know what the correct path is).?
Thank you both! On to the work for me. Radu.?
On Sat, Sep 17, 2022 at 4:42 PM Raymond Domp Frank < hewpatek@...> wrote: On Sun, Sep 18, 2022 at 01:22 AM, freshndaire wrote:
I would not call this unit hard to service or a poor mechanical design.? Pull the big aluminum hunk and you have lots of access!? The synthesizer module has 3 long bolts holding it in.? Remove the SMA Semi-rigid coax cable from the module's backplane then pull the 3 screws in the middle and you can lift the synth module and set it aside with the other cables plugged in IIRC.
So my memory served me right!
Raymond
|
Re: Pozidrive screws on HP covers
Back in the '60's, while In the USAF, we knew these as "Reed and Prince" screw heads.? I've since noted the more commonly used term of Pozidriv's.? .
|
Do you know at power up the output is ~ -80dBm - try setting the amplatude to 0dBm and be sure you reconnected the hardline from the RF unit to the attenuator. Any front panel diagnostics lit ???
Cheers!
Bruce
Quoting Tom Lee <tomlee@...>:
toggle quoted message
Show quoted text
Great news, indeed. Keep going, Radu!
-- Cheers,
Tom
--
Prof. Thomas H. Lee
Allen Ctr., Rm. 205
350 Jane Stanford Way
Stanford University
Stanford, CA 94305-4070
On 9/17/2022 20:27, Radu Bogdan Dicher wrote:
Great news, folks.
After finding out both A15CR1 and CR2 were shorted, I replaced them with 1N4003s, and all rails are now coming online in spec?(while having the board out, I also replaced all 10uF caps). Now the?+15V is just a hair off at 14.987V (should be within 0.01V of 15V), but I can't imagine that's a huge deal.
However, I don't seem to see any signal coming out of it. Learning how to use it, so take that with a grain of salt.
Radu.
On Sat, Sep 17, 2022 at 6:54 PM Radu Bogdan Dicher via groups.io <> <vondicher@...> wrote:
Well, after finally taking this apart (I'd post pictures, but I am
a bit ptsd'ed...) I have two shorted diodes on A15 - CR1 and CR2.
I am thinking vanilla 1N4148 would be OK in this position - thoughts?
Thank you,
Radu.
On Sat, Sep 17, 2022 at 5:30 PM Radu Bogdan Dicher via groups.io
<> <vondicher@...> wrote:
Raymond, Clay,
You both sort of got beat by a hair with the 4 youtube videos
Clay is talking about. Must be this:
.
And yes, I take back my statement on the overall assembly
design of this unit. I didn't know there's just one SMA
connecting?the shielded modules (there's actually several in
my unit as to, I think, the youtube sample, but they're not
rigid lines), but overall, it's a breeze to take apart (once
you know what the correct path is).
Thank you both! On to the work for me.
Radu.
On Sat, Sep 17, 2022 at 4:42 PM Raymond Domp Frank
<hewpatek@...> wrote:
On Sun, Sep 18, 2022 at 01:22 AM, freshndaire wrote:
I would not call this unit hard to service or a poor
mechanical design.? Pull the big aluminum hunk and you
have lots of access!? The synthesizer module has 3
long bolts holding it in.? Remove the SMA Semi-rigid
coax cable from the module's backplane then pull the 3
screws in the middle and you can lift the synth module
and set it aside with the other cables plugged in IIRC.
So my memory served me right!
Raymond
|
Great news, indeed. Keep going, Radu!
-- Cheers,
Tom
--
Prof. Thomas H. Lee
Allen Ctr., Rm. 205
350 Jane Stanford Way
Stanford University
Stanford, CA 94305-4070
On 9/17/2022 20:27, Radu Bogdan Dicher
wrote:
toggle quoted message
Show quoted text
Great news, folks.?
After finding out both A15CR1 and CR2 were shorted, I
replaced them with 1N4003s, and all rails are now coming
online in spec?(while having the board out, I also replaced
all 10uF caps). Now the?+15V is just a hair off at 14.987V
(should be within 0.01V of 15V), but I can't imagine that's a
huge deal.?
However, I don't seem to see any signal coming out of
it. Learning how to use it, so take that with a grain of
salt.?
Radu.?
On Sat, Sep 17, 2022 at 6:54
PM Radu Bogdan Dicher via <vondicher= [email protected]>
wrote:
Well, after finally taking this apart (I'd post
pictures, but I am a bit ptsd'ed...) I have two shorted
diodes on A15 - CR1 and CR2.?
I am thinking vanilla 1N4148 would be OK in this
position - thoughts??
Thank you,
Radu.?
On Sat, Sep 17, 2022 at
5:30 PM Radu Bogdan Dicher via
<vondicher= [email protected]>
wrote:
Raymond, Clay,
You both sort of got beat by a hair with the 4
youtube videos Clay is talking about. Must be this:?.?
And yes, I take back my statement on the overall
assembly design of this unit. I didn't know there's
just one SMA connecting?the shielded modules (there's
actually several in my unit as to, I think, the
youtube sample, but they're not rigid lines), but
overall, it's a breeze to take apart (once you know
what the correct path is).?
Thank you both! On to the work for me.
Radu.?
On Sat, Sep 17, 2022
at 4:42 PM Raymond Domp Frank < hewpatek@...>
wrote:
On Sun, Sep 18,
2022 at 01:22 AM, freshndaire wrote:
I would not call this unit hard to service
or a poor mechanical design.? Pull the big aluminum
hunk and you have lots of access!? The synthesizer
module has 3 long bolts holding it in.? Remove the
SMA Semi-rigid coax cable from the module's
backplane then pull the 3 screws in the middle and
you can lift the synth module and set it aside with
the other cables plugged in IIRC.
So my memory served me right!
Raymond
|
Great news, folks.?
After finding out both A15CR1 and CR2 were shorted, I replaced them with 1N4003s, and all rails are now coming online in spec?(while having the board out, I also replaced all 10uF caps). Now the?+15V is just a hair off at 14.987V (should be within 0.01V of 15V), but I can't imagine that's a huge deal.? However, I don't seem to see any signal coming out of it. Learning how to use it, so take that with a grain of salt.? Radu.?
On Sat, Sep 17, 2022 at 6:54 PM Radu Bogdan Dicher via <vondicher= [email protected]> wrote: Well, after finally taking this apart (I'd post pictures, but I am a bit ptsd'ed...) I have two shorted diodes on A15 - CR1 and CR2.? I am thinking vanilla 1N4148 would be OK in this position - thoughts?? Thank you, Radu.?
On Sat, Sep 17, 2022 at 5:30 PM Radu Bogdan Dicher via <vondicher= [email protected]> wrote: Raymond, Clay, You both sort of got beat by a hair with the 4 youtube videos Clay is talking about. Must be this:?.?
And yes, I take back my statement on the overall assembly design of this unit. I didn't know there's just one SMA connecting?the shielded modules (there's actually several in my unit as to, I think, the youtube sample, but they're not rigid lines), but overall, it's a breeze to take apart (once you know what the correct path is).?
Thank you both! On to the work for me. Radu.?
On Sat, Sep 17, 2022 at 4:42 PM Raymond Domp Frank < hewpatek@...> wrote: On Sun, Sep 18, 2022 at 01:22 AM, freshndaire wrote:
I would not call this unit hard to service or a poor mechanical design.? Pull the big aluminum hunk and you have lots of access!? The synthesizer module has 3 long bolts holding it in.? Remove the SMA Semi-rigid coax cable from the module's backplane then pull the 3 screws in the middle and you can lift the synth module and set it aside with the other cables plugged in IIRC.
So my memory served me right!
Raymond
|
Re: Pozidrive screws on HP covers
I'm also appreciating learning?on this! I had no idea. Many thanks?to the OP.? I also found out I actually have a couple of these tips for my "fine work" bench?driver. A #1 and a #2. I used the?#2 today!? Radu.?
Here is a link to some pictures comparing Phillips and Pozidriv screwdrivers and screw heads. Photos were taken of the two types next to one another to permit easy observation of the differences between them - Phillips on the left and Pozidriv on the right in all images.
And as for working on old HP gear, best to have both Phillips AND Pozi close at hand, as over the years the PZ screws tend to become lost and are often replaced with Phillips, resulting in a mixed bag of hardware. In this instance, the two screws in the final gallery photo both came from the same instrument, which happens to have three Phillips and one Pozi holding its top cover on.. -Pat
> ------ Original Message ------
> From: vondicher@...
> To: [email protected]
> Sent: Saturday, September 17, 2022 5:40 PM
> Subject: Re: [HP-Agilent-Keysight-equipment] Pozidrive screws on HP covers
Interesting. Maybe that's why I've had such a hard time trying to avoid ruining those as frequently as I had. Do you have an image with a "pozidrive" tip? Radu.
I failed to realize, until recently, that the screws on the covers on many HP instruments are Pozidrive and not Philips.
Had I looked more carefully I would have seen the X indicator but it was only after I actually used a Pozidrive on one that I felt how much better it was! Not surprisingly it's a much better / firmer fit.
Live and learn I guess. I'll never use a Philips on one again!
|
Hello Walter,
?
I¡¯m still searching for HP parts:
¡¤????????
The hybrid for the HP 3476A, 1813-0091
¡¤????????
The winged knob for the HP 8640B Range switch.
Can you help, please?
?
Cheers, Brian, VK2GCE
?
?
Lots of tek and hp goodies added to the stuff page, reduced
the price on the Tek AA501A distortion analyzer package, added a nice HP power
meter (436A) and sensor, and many $1 and R+D items added.
There is a huge assortment of HP spare parts there, let me know if you need
something not shown, as I have thousands of HP parts we are trying to clear
out. Have lots of REAR feet for hp instruments if anybody can use them, free.
these go on large generators, counters, etc. Also have a lot of paper hp
manuals, if you will be up this way, you are welcome to stop in and look for
any you can use. not ideal for shipping, just too much weight.
walter (walter2 -at- sphere.bc.ca)
|
Re: Pozidrive screws on HP covers
Here is a link to some pictures comparing Phillips and Pozidriv screwdrivers and screw heads. Photos were taken of the two types next to one another to permit easy observation of the differences between them - Phillips on the left and Pozidriv on the right in all images.
And as for working on old HP gear, best to have both Phillips AND Pozi close at hand, as over the years the PZ screws tend to become lost and are often replaced with Phillips, resulting in a mixed bag of hardware. In this instance, the two screws in the final gallery photo both came from the same instrument, which happens to have three Phillips and one Pozi holding its top cover on.. -Pat
> ------ Original Message ------
> From: vondicher@...
> To: [email protected]
> Sent: Saturday, September 17, 2022 5:40 PM
> Subject: Re: [HP-Agilent-Keysight-equipment] Pozidrive screws on HP covers
Interesting. Maybe that's why I've had such a hard time trying to avoid ruining those as frequently as I had. Do you have an image with a "pozidrive" tip? Radu.
I failed to realize, until recently, that the screws on the covers on many HP instruments are Pozidrive and not Philips.
Had I looked more carefully I would have seen the X indicator but it was only after I actually used a Pozidrive on one that I felt how much better it was! Not surprisingly it's a much better / firmer fit.
Live and learn I guess. I'll never use a Philips on one again!
|
Re: Pozidriv screws on HP covers
On Sat, Sep 17, 2022 at 06:16 PM, Chuck Harris wrote:
Torx and square drive are the kings of readily available
high torque screws
Question: Is Torx and "star drive" the same thing? Perhaps the only difference is that Torx is trademarked?? Pete
|
David C. Partridge
Kevin A.
Dave McGuire
Patricio A. Greco
Mike D.
Brian
Cubdriver
saipan59 (Pete)