Re: Semiconductor test set advice
IIRC it's a CX-4/VT-211, but at any rate it's a 1500 V triode used in B-17 transmitters. They are *big*. The Army ordered 100,000 in 1939 and they were dirt cheap along with the 100,000 transmitters for years. Now the audiophools pay $400 a pop for matched pairs. Matched being the same color parts and date code. I had an unopened case of 8 made by GE with a 1942 dated slip of paper. I cut the string to see what they were :-(
1619 sounds about right. These are packaged as spares for an intercom. A push-pull with the filaments in series would work fine at 6 V other than perhaps slightly shorter life. I've seen them listed as 2 V and 3 V filaments, but have never tracked down vintage documentation. Just something I read on the Internet ;-)
When I saw a listing for 5U4Gs for $20 my jaw dropped. Go check ebay and tubedepot.com.
Oh, and if anyone is interested I've got a bunch of 6 KV mercury rectifiers complete with GE warranty return slips ;-)
Have Fun!
Reg
|
Re: Are there any HP CRT refrenece documents?
On Mon, Apr 27, 2020 at 05:04 PM, walter shawlee wrote:
you can see it here:
FYI, the "Go right to the catalog" link doesn't seem to do anything for HP (it DOES work for Tek). However, even though the page doesn't appear to change, I see that if I scroll down there is a list of HP scope CRT's. Pete
|
Hopefully this will help.
??
On Mon, Apr 27, 2020 at 4:39 PM Paul Bicknell < paul@...> wrote:
Hi Michael
?
A picture specks a thousand words
?
?
You said you wanted a
power button, not a cable assembly with switch. According to Keysight the 5062
number you quoted is a cable assembly - line switch, not a cable assembly with
line switch. Switch part numbers start with 3101. It may be buried deeper in
the parts list.?
?
According to the service manual, it is a?CABLE ASSY WITH LINE
SWITCH, A1 TO A16J9
?
That¡¯s a cable
assembly...
?
From what I can gather, the part number is?5062-4809.
?
Michael,
A part number would help
those of us who don¡¯t have that particular model of spectrum ?analyzer
?but might have some parts.?
?Hello,
I am looking for the power button for HP 859x and 856x series of Spectrum
Analyzers.??The switch may also be used in other HP
units, just not sure.? Let me know what you have, and the cost.
No virus found in this message.
Checked by AVG -
Version: 2016.0.8048 / Virus Database: 4793/15886 - Release Date: 08/14/18
Internal Virus Database is out of date.
|
Re: Maximum depth of HP rack mountable gear?
I used their metal bases, stored the tops elsewhere, then used 4 * 8 foot melamine as a table top.? A bit of molding will add a decent edge.
The "under desk" drawer set (rollabout) is good for under bench storage.
The tops and sides are particle board, and not the highest quality.? If you can stand melamin or the high density fiber board, you can roll your own.
You can also buy a cover that you have to glue to plywood or the like, and get it in your own choice of colors.
Built an audio work surface with a kitchen counter worktop with that.
Harvey
toggle quoted message
Show quoted text
On 4/27/2020 5:33 PM, Jim Ford wrote: True, it's not super high quality.? And yes, I wish everything were made out of real wood instead of particle board, but the IKEA stuff is cheap. ?We spent a small fraction of what it would cost for real wood, and for what we use it for, it works just fine.? No point in paying for a Rolls-Royce when a Renault or a Chevy or whatever will do.? Same with Harbor Freight tools; not the greatest quality, but if you're a homeowner only using them a few times a year, why pay for something that will last forever?? Now if I were a professional tradesman making my living with power tools, I for sure would not buy them at HF; they would probably crap out within months, if not weeks.? Buying stuff is just like engineering; it's all in the tradeoffs.
Jim
------ Original Message ------
From: "Tam Hanna" <tamhan@...>
To: [email protected]
Sent: 4/27/2020 2:45:26 AM
Subject: Re: [HP-Agilent-Keysight-equipment] Maximum depth of HP rack mountable gear?
Avoid IKEA. Much of their furniture is hollow on the inside, especially the worktop desk surfaces. El Wife found that out painfully when drilling...
With best regards
Tam HANNA
Enjoy electronics? Join 15k7 other followers by visiting the Crazy Electronics Lab at
On 2020. 04. 27. 3:21, Jim Ford wrote:
Yeah, don't discount kitchen DIY furniture as found at places like IKEA.? The wife and I redid our computer/music/scrapbooking room with kitchen cabinets rather than the office stuff about 7 years ago. IKEA had way better selection in the kitchen department than in the office department.? The office stuff they offered was really lame! Of course now with the Corona Virus and working from home, my laptop computers and desk area get a lot more use!
Jim Ford
------ Original Message ------
From: "Tam Hanna" <tamhan@...>
To: [email protected]
Sent: 4/24/2020 10:55:02 PM
Subject: Re: [HP-Agilent-Keysight-equipment] Maximum depth of HP rack mountable gear?
Wife introduced kitchen work surfaces (Kuechenarbeitsplatte). Cheap, can be had at home improvement store, works well here.
Tam
With best regards
Tam HANNA
Enjoy electronics? Join 15k7 other followers by visiting the Crazy Electronics Lab at
On 2020. 04. 25. 7:50, John Parkins G8KVP wrote:
Hello Dave,
No nothing bad at all, just making it more difficult for ourselves.
When we moved house I took over a room for my gear, so I was able to
build benches, shelves etc as I wanted them. At first it was fine, but
I think as we all do a flat surface is for putting things on. So the
amount of available work area reduces and reduces until we're trying
to work on a large bit of gear in a space which isn't quite big
enough...... I've over come this by having a removable 'bench' which
is only put into place when I need the extra room and removed
afterwards. If it were left in place it would end up covered in stuff!
We can't help it, I think it's in all our natures to collect.
Friday, April 24, 2020, 6:53:46 PM, you wrote:
DM> On 4/24/20 12:27 PM, John Parkins G8KVP wrote:
WORKBENCH! How ever wide you make them they just aren't wide enough.
DM>?? Unfinished flat doors make very good workbenches. And desks, for that
DM> matter.
Why do we do this to ourselves?
DM>?? You say this as if there's something bad about it.
DM>???????? -Dave
|
Hi Michael
?
A picture specks a thousand words
?
?
You said you wanted a
power button, not a cable assembly with switch. According to Keysight the 5062
number you quoted is a cable assembly - line switch, not a cable assembly with
line switch. Switch part numbers start with 3101. It may be buried deeper in
the parts list.?
toggle quoted message
Show quoted text
On Apr 27, 2020, at 5:50
PM, Michael Yellin <michaelhq54@...> wrote:
?
According to the service manual, it is a?CABLE ASSY WITH LINE
SWITCH, A1 TO A16J9
?
That¡¯s a cable
assembly...
?
From what I can gather, the part number is?5062-4809.
?
Michael,
A part number would help
those of us who don¡¯t have that particular model of spectrum ?analyzer
?but might have some parts.?
?Hello,
I am looking for the power button for HP 859x and 856x series of Spectrum
Analyzers.??The switch may also be used in other HP
units, just not sure.? Let me know what you have, and the cost.
No virus found in this message.
Checked by AVG -
Version: 2016.0.8048 / Virus Database: 4793/15886 - Release Date: 08/14/18
Internal Virus Database is out of date.
|
You said you wanted a power button, not a cable assembly with switch. According to Keysight the 5062 number you quoted is a cable assembly - line switch, not a cable assembly with line switch. Switch part numbers start with 3101. It may be buried deeper in the parts list.?
toggle quoted message
Show quoted text
On Apr 27, 2020, at 5:50 PM, Michael Yellin <michaelhq54@...> wrote:
? According to the service manual, it is a?CABLE ASSY WITH LINE SWITCH, A1 TO A16J9 That¡¯s a cable assembly... ? From what I can gather, the part number is?5062-4809.
Thanks, Michael Michael,
A part number would help those of us who don¡¯t have that particular model of spectrum ?analyzer ?but might have some parts.? ?Hello, I am looking for the power button for HP 859x and 856x series of Spectrum Analyzers.?? The switch may also be used in other HP units, just not sure.? Let me know what you have, and the cost.
?
Kindly,
Michael
|
Re: Are there any HP CRT refrenece documents?
Just like Tek, Hp did make their own CRTs, after the early
scopes like the 120 and related units, where standard jedec numbers
were used (5ADP1, 5AQP1, etc.). Nobody was happy buying tubes from
Dumont, however, too much competitive friction, and that meant
learning to make tubes from scratch.
The hp internal designs eventually were quite advanced, and they
sometimes used a clever technique called a flood gun to light up the
phosphor, making the black graticule stand out.? Tek side lit the
actual graticule with lamps to get it to be visible, two very
different optical techniques. They (hp) had some very fast CRTs, as
well as fast storage tubes, to at least 275Mhz. I do not know where
the hp? CRT plant was located, or when they stopped production.
The magnetic raster scan tubes used later (digital scopes and logic
analyzers) were japanese imports, basically TV tubes, and some color
systems used a turn-key CRT/video display bock from Sony.
I am still trying to find actual specs on the 5083-series tubes, but
so far, that has proved elusive. I do keep an index of tubes and
units on our site I made up from actual systems and manuals, you can
see it here:
all the best,
walter
--
Walter Shawlee 2
Sphere Research Corp. 3394 Sunnyside Rd.
West Kelowna, BC, V1Z 2V4 CANADA
Phone: +1 (250-769-1834 -:-
+We're all in one boat, no matter how it looks to you. (WS2)
+All you need is love. (John Lennon)
+But, that doesn't mean other things don't come in handy. (WS2)
+Nature is trying very hard to make us succeed, but nature does not depend on us.
We are not the only experiment. (R. Buckminster Fuller)
|
According to the service manual, it is a?CABLE ASSY WITH LINE SWITCH, A1 TO A16J9
That¡¯s a cable assembly... ? From what I can gather, the part number is?5062-4809.
Thanks, Michael Michael,
A part number would help those of us who don¡¯t have that particular model of spectrum ?analyzer ?but might have some parts.? ?Hello, I am looking for the power button for HP 859x and 856x series of Spectrum Analyzers.?? The switch may also be used in other HP units, just not sure.? Let me know what you have, and the cost.
?
Kindly,
Michael
|
That¡¯s a cable assembly...
toggle quoted message
Show quoted text
On Apr 27, 2020, at 5:18 PM, Michael Yellin <michaelhq54@...> wrote:
? From what I can gather, the part number is?5062-4809.
Thanks, Michael Michael,
A part number would help those of us who don¡¯t have that particular model of spectrum ?analyzer ?but might have some parts.? ?Hello, I am looking for the power button for HP 859x and 856x series of Spectrum Analyzers.?? The switch may also be used in other HP units, just not sure.? Let me know what you have, and the cost.
?
Kindly,
Michael
|
Re: How to check the accuracy of an HP 5342A frequency counter
I agree with Bob. I've used beat frequency method WWV with my HP counter and RF generator to set the internal references in each. Once I have used the signal strength meter on my Radio Shack HF receiver DX-160 tuned to WWV to move imperceptibly in no-fade conditions, I will use a guitar tuner also and offset my RF generator from WWV? highest broadcast frequency (20MHZ if possible) and offset by +- 440HZ (20,000,440 HZ . That is the "A" note setting on the guitar tuner, you can use a lower octave for more accuracy, (220 hz offset), but your receiver may filter that audio freq out and you won't know why you can't hear the 'beat whistle', and/or your guitar tuner may filter more than mine does, and not allow you to see the first octave (x2).? Then have the tuner mic near the SW radio speaker, Adjust the RF level out on the RF generator so it mixes with WWV and not overpower it, and you center steady up the tuner needle by adjusting the source, or whatever needs adjusting. Stay away from 5MHZ WWV, noisy and better accuracy during daytime up higher. At least 15 MHZ. I've done it at 25 MHZ also when it was broadcast too.
I would also verify the 10 mhz distribution amp by feeding it the source, and placing 2 of the amps outputs into counter ch A and ch B and setting it up for ratio, and the ratio should always be one. Just to make sure there are no "slips".
NielsenTelecom
|
Re: Are there any HP CRT refrenece documents?
toggle quoted message
Show quoted text
On Mon, Apr 27, 2020 at 01:58 PM, Toby wrote:
I've found that the installed part number can be different from the one
specified in the service manual parts list or as options.
Having "source" listed in such a list could be interesting. (e.g.
"seen
installed", "service manual", "not listed but tested
ok", or option number).
Good point, but as for me, I'm not interested enough to go to the
trouble of opening my units far enough to find an actual HPPN.
Perhaps it's fair to say that what's in the manual is a valid HPPN for the
unit, but maybe not the only one.
The 3 I posted are from the manuals.
Question: HP didn't make any of their own tubes, like Tek did, right? Or, did
Tek even make them, or were they really an OEM contract sort of thing?
Pete
No virus found in this message.
Checked by AVG -
Version: 2016.0.8048 / Virus Database: 4793/15886 - Release Date: 08/14/18
Internal Virus Database is out of date.
|
From what I can gather, the part number is?5062-4809.
Thanks, Michael
Michael,
A part number would help those of us who don¡¯t have that particular model of spectrum ?analyzer ?but might have some parts.? ?Hello, I am looking for the power button for HP 859x and 856x series of Spectrum Analyzers.?? The switch may also be used in other HP units, just not sure.? Let me know what you have, and the cost.
?
Kindly,
Michael
|
Re: WTB HP 11852A or B 50/75 Ohm minimum loss pad
I want to use them for an HP 85046B to make 50R testing. I know that is not the best solution but for my use the results will be acceptable. So I guess the best the pads will be the better results will be at the end.
|
Michael,
A part number would help those of us who don¡¯t have that particular model of spectrum ?analyzer ?but might have some parts.?
toggle quoted message
Show quoted text
On Apr 27, 2020, at 5:02 PM, Michael Yellin <michaelhq54@...> wrote:
?Hello, I am looking for the power button for HP 859x and 856x series of Spectrum Analyzers.?? The switch may also be used in other HP units, just not sure.? Let me know what you have, and the cost.
?
Kindly,
Michael
|
Hello, I am looking for the power button for HP 859x and 856x series of Spectrum Analyzers.?? The switch may also be used in other HP units, just not sure.? Let me know what you have, and the cost.
?
Kindly,
Michael
|
Re: Maximum depth of HP rack mountable gear?
True, it's not super high quality. And yes, I wish everything were made out of real wood instead of particle board, but the IKEA stuff is cheap. We spent a small fraction of what it would cost for real wood, and for what we use it for, it works just fine. No point in paying for a Rolls-Royce when a Renault or a Chevy or whatever will do. Same with Harbor Freight tools; not the greatest quality, but if you're a homeowner only using them a few times a year, why pay for something that will last forever? Now if I were a professional tradesman making my living with power tools, I for sure would not buy them at HF; they would probably crap out within months, if not weeks. Buying stuff is just like engineering; it's all in the tradeoffs.
Jim
toggle quoted message
Show quoted text
------ Original Message ------ From: "Tam Hanna" <tamhan@...> To: [email protected]Sent: 4/27/2020 2:45:26 AM Subject: Re: [HP-Agilent-Keysight-equipment] Maximum depth of HP rack mountable gear? Avoid IKEA. Much of their furniture is hollow on the inside, especially the worktop desk surfaces. El Wife found that out painfully when drilling...
With best regards
Tam HANNA
Enjoy electronics? Join 15k7 other followers by visiting the Crazy Electronics Lab at
On 2020. 04. 27. 3:21, Jim Ford wrote:
Yeah, don't discount kitchen DIY furniture as found at places like IKEA. The wife and I redid our computer/music/scrapbooking room with kitchen cabinets rather than the office stuff about 7 years ago. IKEA had way better selection in the kitchen department than in the office department. The office stuff they offered was really lame! Of course now with the Corona Virus and working from home, my laptop computers and desk area get a lot more use!
Jim Ford
------ Original Message ------
From: "Tam Hanna" <tamhan@...>
To: [email protected]
Sent: 4/24/2020 10:55:02 PM
Subject: Re: [HP-Agilent-Keysight-equipment] Maximum depth of HP rack mountable gear?
Wife introduced kitchen work surfaces (Kuechenarbeitsplatte). Cheap, can be had at home improvement store, works well here.
Tam
With best regards
Tam HANNA
Enjoy electronics? Join 15k7 other followers by visiting the Crazy Electronics Lab at
On 2020. 04. 25. 7:50, John Parkins G8KVP wrote:
Hello Dave,
No nothing bad at all, just making it more difficult for ourselves.
When we moved house I took over a room for my gear, so I was able to
build benches, shelves etc as I wanted them. At first it was fine, but
I think as we all do a flat surface is for putting things on. So the
amount of available work area reduces and reduces until we're trying
to work on a large bit of gear in a space which isn't quite big
enough...... I've over come this by having a removable 'bench' which
is only put into place when I need the extra room and removed
afterwards. If it were left in place it would end up covered in stuff!
We can't help it, I think it's in all our natures to collect.
Friday, April 24, 2020, 6:53:46 PM, you wrote:
DM> On 4/24/20 12:27 PM, John Parkins G8KVP wrote:
WORKBENCH! How ever wide you make them they just aren't wide enough.
DM> Unfinished flat doors make very good workbenches. And desks, for that
DM> matter.
Why do we do this to ourselves?
DM> You say this as if there's something bad about it.
DM> -Dave
|
Re: HP5351B High frequency input connector
There are a lot of pannel mount HP Precission N to SMA connectors available. You could use one of these and the only thing else you need is an SMA(M) to SMA(M) hardline about 4 - 6" long Cheers! Quoting Paul Bicknell <paul@...>:
Hi I suggest you replace it with a good quality SMA or N type N type should
be a HP part the SMA from a well established company such as omni spectra
Paul
_____
From: [email protected]
[mailto:[email protected]] On Behalf Of Jim Potter
Sent: 27 April 2020 17:51
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] HP5351B High frequency input
connector
The high-frequency input connector on an HP 5351B I just purchased appears
to be missing the input connector. I believe it was an APC-3.5. There
appears to be a missing insert. I'm looking for tips on how to repair or
replace this connector. For my purpose a type N connector would be
acceptable as a replacement. I have the service manual. It looks like there
is a cable assembly. One part number for the APC-3.5 and one for the type N.
Thanks, Jim
No virus found in this message.
Checked by AVG - www.avg.com <>
Version: 2016.0.8048 / Virus Database: 4793/15886 - Release Date: 08/14/18
Internal Virus Database is out of date.
|
Re: Are there any HP CRT refrenece documents?
On Mon, Apr 27, 2020 at 01:58 PM, Toby wrote:
I've found that the installed part number can be different from the one
specified in the service manual parts list or as options.
Having "source" listed in such a list could be interesting. (e.g. "seen
installed", "service manual", "not listed but tested ok", or option number).
Good point, but as for me, I'm not interested enough to go to the trouble of opening my units far enough to find an actual HPPN. Perhaps it's fair to say that what's in the manual is a valid HPPN for the unit, but maybe not the only one. The 3 I posted are from the manuals. Question: HP didn't make any of their own tubes, like Tek did, right? Or, did Tek even make them, or were they really an OEM contract sort of thing? Pete
|
Re: HP5351B High frequency input connector
Hi I suggest you replace it with a good
quality SMA or N type? N type should be a HP part? the SMA from a well
established company such as omni spectra
?
Paul
?
The high-frequency input connector on an HP 5351B I just purchased
appears to be missing the input connector. I believe it was an APC-3.5. There
appears to be a missing insert. I'm looking for tips on how to repair or
replace this connector. For my purpose a type N connector would be acceptable
as a replacement. I have the service manual. It looks like there is a cable
assembly. One part number for the APC-3.5 and one for the type N.
Thanks, Jim
No virus found in this message.
Checked by AVG -
Version: 2016.0.8048 / Virus Database: 4793/15886 - Release Date: 08/14/18
Internal Virus Database is out of date.
|
Re: Semiconductor test set advice
Reginald Beardsley via groups.io wrote on 4/27/2020 3:40 PM: I eventually need to sell off a bunch of NOS tubes of Dad's including
a bunch of VT-211s <snip> Hello-- I think you're looking at VT-4s, AKA 211 (no VT prefix) -- the VT-211 crosses to the 6SG7 (small-signal pentode). The 211 commands a premium price in the audio kingdom. <snip>
I forget the tube designation but I've got over 100 of what is basically a 6L6 with 3 V filaments which were used in aircraft intercom systems. I might need to design a guitar amp around a pair of those so I can sell them at good prices. Hello-- These may be 1619s, which according to Sibley's Tube Lore are a "Beam power tube [with a] ?2.5-volt quick-heating filament [and are] very close to a 6L6, slightly derated to 15 W, 45 MHz, introduced 1938. Used mainly (seven tubes) in BC-604/BC-684 FM tank xmtrs... AKA VT-164... Suppressor is pinned out by itself. Production was stopped in 1945, resumed in 1952 after surplus stires were used up. Post-1952 production was to have [a] Micanol base...." My hunch is that the 2.5-volt filament requirement would have the audio crowd screaming and running for the exit<g> .? A 2.5-volt switched-mode DC power convertor would solve that requirement for anyone who doesn't have a bunch of 120V to 2.5V transformers in their iron collection. OTOH, the separate suppressor grid might make the 1619 a candidate for a grounded-grid power amplifier role. Sadly I've not found the 5U4Gs. <snip> People pay crazy prices for them when a silicon diode would be better. Hmm... crazy prices, huh? I must check my tube collection.<g> 73-- Brad? AA1IP? in snowy New Hampshire
|
saipan59 (Pete)
Paul Bicknell
