Re: Quoting Prior Messages (Re: [HP-Agilent-Keysight-equipment] Transistors for the A17 voltage regulator 8642B)
On Mon, 29 Oct 2018, Sergey Kubushyn wrote: Sorry for sending it twice, network glitch... On Mon, 29 Oct 2018, Kuba Ober wrote:
Are you using a mail client that doesn¡¯t keep threads together? Resending
all of that stuff seems wasteful, it¡¯s not as if the previous messages
disappear into the void¡ Any sane email client will show the replied-to
messages preceding the reply itself. Isn¡¯t that so? It looks like you don't understand what mail reader is.
Just remember, there are other OSes than Windoze. There are also text mode
mail clients that doesn't show all those behemytes of stupid html code
automatically. BTW, e-mail was there even before Windoze.
Have you ever happened to look at email headers? Do you think "Me too"
message constitutes a whole percent of the entire email?
Economy nonwithstanding can you explain why anybody would keep many separate
messages instead of one including the entire thread? Do you think one would
enjoy many thousands of messages to navigate through? Do you understand how
many messages e.g. LKML or U-Boot developers' mailing list generates?
Please note that people who are really busy delete _EVERYTHING_ "Me too"
without reading and won't chase any threads unless absolutely necessary.
And no, mail readers don't thread messages. --- * * KSI@home KOI8 Net < > The impossible we do immediately. * * Las Vegas NV, USA < > Miracles require 24-hour notice. * *
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Re: Quoting Prior Messages (Re: [HP-Agilent-Keysight-equipment] Transistors for the A17 voltage regulator 8642B)
On Mon, 29 Oct 2018, Kuba Ober wrote: Are you using a mail client that doesn¡¯t keep threads together? Resending
all of that stuff seems wasteful, it¡¯s not as if the previous messages
disappear into the void¡ Any sane email client will show the replied-to
messages preceding the reply itself. Isn¡¯t that so? It looks like you don't understand what mail reader is. Just remember, there are other OSes than Windoze. There are also text mode mail clients that doesn't show all those behemytes of stupid html code automatically. BTW, e-mail was there even before Windoze. Have you ever happened to look at email headers? Do you think "Me too" message constitutes a whole percent of the entire email? Economy nonwithstanding can you explain why anybody would keep many separate messages instead of one including the entire thread? Do you think one would enjoy many thousands of messages to navigate through? Do you understand how many messages e.g. LKML or U-Boot developers' mailing list generates? Please note that people who are really busy delete _EVERYTHING_ "Me too" without reading and won't chase any threads unless absolutely necessary. And no, mail readers don't thread messages. --- * * KSI@home KOI8 Net < > The impossible we do immediately. * * Las Vegas NV, USA < > Miracles require 24-hour notice. * *
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Re: Quoting Prior Messages (Re: [HP-Agilent-Keysight-equipment] Transistors for the A17 voltage regulator 8642B)
On Mon, 29 Oct 2018, Kuba Ober wrote: It looks like you don't understand what mail reader is. Just remember, there are other OSes than Windoze. There are also text mode mail clients that doesn't show all those behemytes of stupid html code automatically. BTW, e-mail was there even before Windoze. Have you ever happened to look at email headers? Do you think "Me too" message constitutes a whole percent of the entire email? Economy nonwithstanding can you explain why anybody would keep many separate messages instead of one including the entire thread? Do you think one would enjoy many thousands of messages to navigate through? Do you understand how many messages e.g. LKML or U-Boot developers' mailing list generates? Please note that people who are really busy delete _EVERYTHING_ "Me too" without reading and won't chase any threads unless absolutely necessary. And no, mail readers don't thread messages. Are you using a mail client that doesn¡¯t keep threads together? Resending
all of that stuff seems wasteful, it¡¯s not as if the previous messages
disappear into the void¡ Any sane email client will show the replied-to
messages preceding the reply itself. Isn¡¯t that so?
Cheers, Kuba
29 okt. 2018 kl. 14:23 skrev Artekmedia <manuals@...>:
That should have said : I for one just delete threads that DO NOT include prior continuity...more is the loss
On 10/29/2018 2:19 PM, Artekmedia wrote:
_*AMEN !
*_
David K , Mr List Owner: One of things that changed from Yahoo to groups .IO. IN yahoo when using the website interface??? it automatically included the prior message(s) when replying, with Groups IO the default is NOT to include the prior message without the person replying taking an extra step. IS there anyway to change the default reply format with in the IO interface? Those of us using our own mail clients generally don't have the problem but those using the web interface to reply do.
I for one just delete threads that include prior continuity...more is the loss
Dave
manuals@...
On 10/29/2018 1:13 PM, Glenn Little wrote:
This is the problem when people insist on not quoting the original message and appropriate replies.
A little net etiquette goes a long way and reduces questions and confusion.
Glenn
On 10/29/2018 12:41 PM, Sergey Kubushyn wrote:
On Mon, 29 Oct 2018, Goran Finnberg wrote:
Sergey Kubushyn:
2N4401 is _NOT_ a transistor. It is THYRISTOR aka SCR. Sorry, no.
The 2N4401 is an NPN transistor.
Datasheet here:
www.onsemi.com/pub_link/Collateral/2N4401-D.PDF I think 4401 is a typo -- it is a TO-92 transistor and original post was
about 2N4101 in TO-66 package:
pdf.datasheetcatalog.com/datasheets/newjerseysemiconductor/2N4101-2N4102.pdf
There is no 2N4401 in TO-66; it is a low power general purpose transistor,
nothing special. --- * * KSI@home KOI8 Net < > The impossible we do immediately. * * Las Vegas NV, USA < > Miracles require 24-hour notice. * *
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Re: HP 8341B Band 3 Un Levelled
I've had a problem similar to yours a few years ago with a 8340B. Swapping modules didn't help. It turned out that some of the feed-through caps (from the modules through the main PCB) had become leaky! Resistances of a few kOhms! Cleaning them (just the "isolation" part, while mounted in te PCB) solved the problem.
Raymond
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Re: Quoting Prior Messages (Re: [HP-Agilent-Keysight-equipment] Transistors for the A17 voltage regulator 8642B)
Are you using a mail client that doesn¡¯t keep threads together? Resending all of that stuff seems wasteful, it¡¯s not as if the previous messages disappear into the void¡ Any sane email client will show the replied-to messages preceding the reply itself. Isn¡¯t that so?
Cheers, Kuba
toggle quoted message
Show quoted text
29 okt. 2018 kl. 14:23 skrev Artekmedia <manuals@...>:
That should have said : I for one just delete threads that DO NOT include prior continuity...more is the loss
On 10/29/2018 2:19 PM, Artekmedia wrote:
_*AMEN !
*_
David K , Mr List Owner: One of things that changed from Yahoo to groups .IO. IN yahoo when using the website interface? it automatically included the prior message(s) when replying, with Groups IO the default is NOT to include the prior message without the person replying taking an extra step. IS there anyway to change the default reply format with in the IO interface? Those of us using our own mail clients generally don't have the problem but those using the web interface to reply do.
I for one just delete threads that include prior continuity...more is the loss
Dave
manuals@...
On 10/29/2018 1:13 PM, Glenn Little wrote:
This is the problem when people insist on not quoting the original message and appropriate replies.
A little net etiquette goes a long way and reduces questions and confusion.
Glenn
On 10/29/2018 12:41 PM, Sergey Kubushyn wrote:
On Mon, 29 Oct 2018, Goran Finnberg wrote:
Sergey Kubushyn:
2N4401 is _NOT_ a transistor. It is THYRISTOR aka SCR. Sorry, no.
The 2N4401 is an NPN transistor.
Datasheet here:
www.onsemi.com/pub_link/Collateral/2N4401-D.PDF I think 4401 is a typo -- it is a TO-92 transistor and original post was
about 2N4101 in TO-66 package:
pdf.datasheetcatalog.com/datasheets/newjerseysemiconductor/2N4101-2N4102.pdf
There is no 2N4401 in TO-66; it is a low power general purpose transistor,
nothing special.
---
*
*? KSI@home??? KOI8 Net? < >? The impossible we do immediately.? *
*? Las Vegas?? NV, USA?? < >? Miracles require 24-hour notice.?? *
*
--
Dave
Manuals@...
www.ArtekManuals.com
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Re: Quoting Prior Messages (Re: [HP-Agilent-Keysight-equipment] Transistors for the A17 voltage regulator 8642B)
That should have said : I for one just delete threads that DO NOT include prior continuity...more is the loss
toggle quoted message
Show quoted text
On 10/29/2018 2:19 PM, Artekmedia wrote: _*AMEN !
*_
David K , Mr List Owner: One of things that changed from Yahoo to groups .IO. IN yahoo when using the website interface? it automatically included the prior message(s) when replying, with Groups IO the default is NOT to include the prior message without the person replying taking an extra step. IS there anyway to change the default reply format with in the IO interface? Those of us using our own mail clients generally don't have the problem but those using the web interface to reply do.
I for one just delete threads that include prior continuity...more is the loss
Dave
manuals@...
On 10/29/2018 1:13 PM, Glenn Little wrote:
This is the problem when people insist on not quoting the original message and appropriate replies.
A little net etiquette goes a long way and reduces questions and confusion.
Glenn
On 10/29/2018 12:41 PM, Sergey Kubushyn wrote:
On Mon, 29 Oct 2018, Goran Finnberg wrote:
Sergey Kubushyn:
2N4401 is _NOT_ a transistor. It is THYRISTOR aka SCR. Sorry, no.
The 2N4401 is an NPN transistor.
Datasheet here:
www.onsemi.com/pub_link/Collateral/2N4401-D.PDF I think 4401 is a typo -- it is a TO-92 transistor and original post was
about 2N4101 in TO-66 package:
pdf.datasheetcatalog.com/datasheets/newjerseysemiconductor/2N4101-2N4102.pdf
There is no 2N4401 in TO-66; it is a low power general purpose transistor,
nothing special.
---
*
*? KSI@home??? KOI8 Net? < >? The impossible we do immediately.? *
*? Las Vegas?? NV, USA?? < >? Miracles require 24-hour notice.?? *
*
--
Dave
Manuals@...
www.ArtekManuals.com
|
Quoting Prior Messages (Re: [HP-Agilent-Keysight-equipment] Transistors for the A17 voltage regulator 8642B)
_*AMEN !
*_
David K , Mr List Owner: One of things that changed from Yahoo to groups .IO. IN yahoo when using the website interface? it automatically included the prior message(s) when replying, with Groups IO the default is NOT to include the prior message without the person replying taking an extra step. IS there anyway to change the default reply format with in the IO interface? Those of us using our own mail clients generally don't have the problem but those using the web interface to reply do.
I for one just delete threads that include prior continuity...more is the loss
Dave
manuals@...
toggle quoted message
Show quoted text
On 10/29/2018 1:13 PM, Glenn Little wrote: This is the problem when people insist on not quoting the original message and appropriate replies.
A little net etiquette goes a long way and reduces questions and confusion.
Glenn
On 10/29/2018 12:41 PM, Sergey Kubushyn wrote:
On Mon, 29 Oct 2018, Goran Finnberg wrote:
Sergey Kubushyn:
2N4401 is _NOT_ a transistor. It is THYRISTOR aka SCR. Sorry, no.
The 2N4401 is an NPN transistor.
Datasheet here:
www.onsemi.com/pub_link/Collateral/2N4401-D.PDF I think 4401 is a typo -- it is a TO-92 transistor and original post was
about 2N4101 in TO-66 package:
pdf.datasheetcatalog.com/datasheets/newjerseysemiconductor/2N4101-2N4102.pdf
There is no 2N4401 in TO-66; it is a low power general purpose transistor,
nothing special.
---
*
*? KSI@home??? KOI8 Net? < >? The impossible we do immediately.? *
*? Las Vegas?? NV, USA?? < >? Miracles require 24-hour notice.?? *
*
--
Dave
Manuals@...
www.ArtekManuals.com
|
Re: HP 8341B Band 3 Un Levelled
Look at the YTO alignment - put a detector on it and look at slope of RG
output (unleveled). If line is relatively smooth, alignment may work, if
you see "squiggles" possible YTO problem (still try alignment)
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On Mon, October 29, 2018 10:10, MARC CHRISTIAN wrote: Afternoon HP Group
Trying to sort our HP8341B 20GHz Sweeper but Problem with Band 3 13.5 GHz
¨C 20 GHz Un-Levelled Light is ON . Setting 0.0dBm Level on Lower Bands is
OK (CW Mode) but Band 3 Levels go too ¨C13dBm to ¨C19dBm All Voltage Rails
are OK and done some Board Swaps with another Unit but not cured problem
yet.... any ideas ???
Kind regards
Marc Christian
Telford Electronics. Old Officers Mess. Hoo Farm. Humbers Lane. Horton
Telford. Shropshire. TF6 6DJ. UK
01952 605451
www.telford-electronics.co.uk
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Re: HP 8341B Band 3 Un Levelled
Check for AC ripple on the power supply rails.
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Re: Transistors for the A17 voltage regulator 8642B
This is the problem when people insist on not quoting the original message and appropriate replies.
A little net etiquette goes a long way and reduces questions and confusion.
Glenn
toggle quoted message
Show quoted text
On 10/29/2018 12:41 PM, Sergey Kubushyn wrote: On Mon, 29 Oct 2018, Goran Finnberg wrote:
Sergey Kubushyn:
2N4401 is _NOT_ a transistor. It is THYRISTOR aka SCR. Sorry, no.
The 2N4401 is an NPN transistor.
Datasheet here:
www.onsemi.com/pub_link/Collateral/2N4401-D.PDF I think 4401 is a typo -- it is a TO-92 transistor and original post was
about 2N4101 in TO-66 package:
pdf.datasheetcatalog.com/datasheets/newjerseysemiconductor/2N4101-2N4102.pdf
There is no 2N4401 in TO-66; it is a low power general purpose transistor,
nothing special.
---
*
*? KSI@home??? KOI8 Net? < >? The impossible we do immediately.? *
*? Las Vegas?? NV, USA?? < >? Miracles require 24-hour notice.?? *
*
--
-----------------------------------------------------------------------
Glenn Little ARRL Technical Specialist QCWA LM 28417
Amateur Callsign: WB4UIV wb4uiv@... AMSAT LM 2178
QTH: Goose Creek, SC USA (EM92xx) USSVI LM NRA LM SBE ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"
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Re: HP 8341B Band 3 Un Levelled
I didn't have this specific one but I did have a similar issue with 8340B going unleveled in Band 2 - The solution to stop the unleveling (but not to get the output back into spec) was to reload the values from the print out in the case.?
Not sure if they got corrupted, someone played with them or something else but doing that fixed the unleveled issue and allowed me to get on with tweaking the unit.
Might be worth a try.
TonyG
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Re: Transistors for the A17 voltage regulator 8642B
On Mon, 29 Oct 2018, Goran Finnberg wrote: Sergey Kubushyn:
2N4401 is _NOT_ a transistor. It is THYRISTOR aka SCR. Sorry, no.
The 2N4401 is an NPN transistor.
Datasheet here:
www.onsemi.com/pub_link/Collateral/2N4401-D.PDF I think 4401 is a typo -- it is a TO-92 transistor and original post was about 2N4101 in TO-66 package: pdf.datasheetcatalog.com/datasheets/newjerseysemiconductor/2N4101-2N4102.pdf There is no 2N4401 in TO-66; it is a low power general purpose transistor, nothing special. --- * * KSI@home KOI8 Net < > The impossible we do immediately. * * Las Vegas NV, USA < > Miracles require 24-hour notice. * *
|
Re: Transistors for the A17 voltage regulator 8642B
At 11:00 AM 10/29/2018, wilson2115 wrote: I am currently testing Q10 which is 1884-0065 PRX, which is shown as 2N3670 in the manual. Note that the 1884-0065 is not shown as identical to the 2N3670 in the HP transistor cross references, so it may be a selected 2N3670. Dale H. Cook, GR/HP/Tek Collector, Roanoke/Lynchburg, VA
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Re: HP 8341B Band 3 Un Levelled
Afternoon HP Group
?
?????????????????????
Trying to sort our HP8341B 20GHz Sweeper but Problem with Band 3 13.5 GHz ¨C 20
GHz Un-Levelled Light is ON . Setting 0.0dBm Level on Lower Bands is OK (CW
Mode) but Band 3 Levels go too ¨C13dBm to ¨C19dBm? All Voltage Rails are OK
and done some Board Swaps with another Unit but not cured problem yet.... any
ideas ???
?
Kind
regards
Marc Christian
Telford Electronics. Old Officers Mess. Hoo
Farm. Humbers Lane. Horton
Telford. Shropshire. TF6 6DJ. UK
01952
605451
www.telford-electronics.co.uk
|
Re: Transistors for the A17 voltage regulator 8642B
I had several fuses on A18 blown as a result of the misaligned connector to A17, I replaced them all. One of them was hard to get which was a 1/4 ampere fuse. I am currently reassembling A17 as the various SCR's and transistors appear. I will see if in fact power is getting to A17 from A18.
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Re: HP8663A Power supply, was: Firmware difference
Hi Scott
Thanks for your input, But the 8663A originally has a SMPS, same PSU thats in the 8662A. Three of the voltages, -40V, -10V and +20V go trough a linear regulator board, that I do have, and will use.
At least Mean Well is a known producer from Taiwan that's been in this businesses? for several years, so guess it will be better than the noname Chinese PSU modules.
Time will show.
Askild
On Mon, Oct 29, 2018 at 3:30 PM Scott McGrath < scott@...> wrote: I think you are going to want better supplies than the inexpensive mean-wells SMPS,? ?HP used linear power supplies for a reason and that was there are no HF components on the DC supply rails to cause noise problems in the circuits.?
One place they deviated from that? was the 70000 series where the main chassis was a massive SMPS
Content by Scott
Typos by Siri
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Re: Transistors for the A17 voltage regulator 8642B
I assume you have checked all the 5 fuses on the A18 board? If the fan works it means one of the negative supplies is ok (pre-regulator at least) but there are 4 other fuses
measuring on the large capacitor pins is no good because the fuses come AFTER the capacitors. you should measure the voltages at the edge of A17
this thing blows fuses sometimes even if the PSU is ok (due to strong rush in currents I think) specially if? the switch was turned on before plugging it to the outlet
note that the pre-regulator supply in this beast is always on even after turning the switch off
?
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Re: Transistors for the A17 voltage regulator 8642B
I will have to get back on what voltages I measured, however at the time of the incident which was some time ago, I recall from memory the fan came on when I pushed the power button but all the LED's on A17 were all out and there was no display on the front. This is after I realigned the power connector. I figured I probably blew something in the regulator. I should have measured the voltages coming out of the regulator test points but I did measure the voltages out of the rectifier board and they were all fine and within tolerance
I am currently testing Q10 which is 1884-0065 PRX, which is shown as 2N3670 in the manual. I performed the same test on it as the 2N4101 with the bulb and touching the gate, it works. However my concern is the current draw when I touch the gate it rises to my set current limit of about 0.4 to 0.5 on the DC supply and when I release it goes down and the bulb glows.
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Re: Transistors for the A17 voltage regulator 8642B
what voltages are you measuring on the 5 supply rails on the edge of A17?
remember if you decide to take the power supply out and disconnect it from the instrument (ribbon cable that goes to A5)?
you must connect the sense lines at each rail to the supply line
otherwise the voltages will be all over the place (no regulation)
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Re: Transistors for the A17 voltage regulator 8642B
I performed a different test to check the 3 2N4101 SCR's, thanks for the correction. I powered them up with a DC supply and the load was a small bulb at 9V, when I touch the gate the SCR latches and the the bulb glows, all 3 are just fine. I attached a data sheet for these transistors which allowed me to run this test
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Sergey Kubushyn