Re: Free 16702A Logic Analyzer Chassis
and I just bought one... :/ :D Enviado do meu Tele-Movel
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On Sat, Aug 25, 2018, 22:23 Niel Viljoen < nviljoen@...> wrote: I hope this is not inappropriate for the group.
I have a working 16702A in good condition EXCEPT that the built in display does not work, I have used it with an external display for some time. It has no cards. I am located in the Bay Area.
N/
I have some others that I may be willing to sell if there is interest as well 16702A fully working with 1 logic analyzer card, 16500C also in very good condition with 1 logic analyzer card.
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Free 16702A Logic Analyzer Chassis
I hope this is not inappropriate for the group.
I have a working 16702A in good condition EXCEPT that the built in display does not work, I have used it with an external display for some time. It has no cards. I am located in the Bay Area.
N/
I have some others that I may be willing to sell if there is interest as well 16702A fully working with 1 logic analyzer card, 16500C also in very good condition with 1 logic analyzer card.
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Re: PCMCIA FLASH and HP8920B
On 08/25/2018 06:01 PM, RFI-EMI-GUY wrote: [Edited Message Follows] [Reason: added PS]
I have this slew of PCMCIA FLASH memory cards and I need help in determining which if any will work with my HP8920B. The manuals are not very descriptive and I don't want to damage anything in trying. I have some test programs in battery backed SRAM PCMCIA and would like them on FLASH for long term . Help? Thanks Joe? PS If anything it would be helpful to know which ones not to bother trying. Just FYI, every time you "edit your post", the rest of us get another copy of all of those pictures in our email. -Dave -- Dave McGuire, AK4HZ New Kensington, PA
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Re: wanted: HP 70K MMS (hp 70000) software: whole system software, individual module software, ROM software, personality software, etc.)
Hi all I have a few disks of 70000 software?
unfortunately I do not have the ability to verify the contents / copy or
transfer ?as listed below
?
?
Description
|
Function
|
Equipment
|
Disk
|
Part Number
|
format
|
?
|
?
|
?
|
?
|
?
|
?
|
System? Verification
|
Executive Disk 1
|
?
|
1
|
5010-1537
|
5.25
|
System? Verification
|
Executive Disk 2
|
?
|
2
|
5010-1537
|
5.25
|
System? Verification
|
Test Disk? 1
|
71100A / 71200A
|
1
|
5010-1537
|
5.25
|
System? Verification
|
Test Disk? 2
|
71300A / 70300A
|
2
|
5010-1537
|
5.25
|
System? Verification
|
Test Disk? 3
|
71201A
|
3
|
5010-1537
|
5.25
|
System? Verification
|
?
|
?
|
?
|
5010-1537
|
Missing
|
?
|
?
|
?
|
?
|
?
|
?
|
?
|
?
|
?
|
?
|
?
|
?
|
?
|
?
|
?
|
?
|
?
|
?
|
Modula Verification
|
Executive Disk 1
|
70908A
|
1 of? 12
|
70908-10002
|
5.25
|
Modula Verification
|
Executive Disk 2
|
70908A
|
2 of? 12
|
70908-10002
|
5.25
|
Modula Verification
|
Executive Disk 3
|
70908A
|
3 of? 12
|
70908-10002
|
5.25
|
Modula Verification
|
Operating Disk
|
70908A
|
4 of? 12
|
70908-10002
|
5.25
|
Modula Verification
|
Drivers Disk 1
|
70908A
|
5 of? 12
|
70908-10002
|
5.25
|
Modula Verification
|
Drivers Disk 2
|
70908A
|
6 of? 12
|
70908-10002
|
5.25
|
Modula Verification
|
Drivers Disk 3
|
70908A
|
7 of? 12
|
70908-10002
|
5.25
|
Modula Verification
|
?
|
70908A
|
8 of? 12
|
70908-10002
|
Missing
|
Modula Verification
|
?
|
70908A
|
9 of? 12
|
70908-10002
|
Missing
|
Modula Verification
|
?
|
70908A
|
10 of? 12
|
70908-10002
|
Missing
|
Modula Verification
|
?
|
70908A
|
11 of? 12
|
70908-10002
|
Missing
|
Modula Verification
|
?
|
70908A
|
12 of? 12
|
70908-10002
|
Missing
|
?
|
?
|
?
|
?
|
?
|
?
|
Modula Verification
|
?
|
70300A
|
1 of 9
|
70300-10002
|
Missing
|
Modula Verification
|
?
|
70300A
|
2 of 9
|
70300-10002
|
Missing
|
Modula Verification
|
Operating Disk
|
70300A
|
3 of 9
|
70300-10002
|
5.25
|
Modula Verification
|
Driver Disk 1
|
70300A
|
4 of 9
|
70300-10002
|
5.25
|
Modula Verification
|
Driver Disk 2
|
70300A
|
5 of 9
|
70300-10002
|
5.25
|
Modula Verification
|
Test Disk 1
|
70300A
|
6 of 9
|
70300-10002
|
5.25
|
Modula Verification
|
Test Disk 2
|
70300A
|
7 of 9
|
70300-10002
|
5.25
|
Modula Verification
|
Test Disk 3
|
70300A
|
8 of 9
|
70300-10002
|
5.25
|
Modula Verification
|
Adjustment Disk
|
70300A
|
9 of 9
|
70300-10002
|
5.25
|
?
?
From:
[email protected]
[mailto:[email protected]]
On Behalf Of garp6
Sent: 25 August 2018 17:53
To: [email protected]
Subject: Re:
[HP-Agilent-Keysight-equipment] wanted: HP 70K MMS (hp 70000) software: whole
system software, individual module software, ROM software, personality
software, etc.)
?
Does anyone have ?*any* ?HP 70K MMS (HP 70000 system ) ?software
to deposit into an Open archive ?
? ?Anyone know of any HP 70K MMS era related HP Engineers, Service
Techs, or MMS end-users that can be contacted, that might be able to help ?
Please let us know.
thank you !!
No virus found in this message.
Checked by AVG -
Version: 2016.0.8048 / Virus Database: 4793/15883 - Release Date: 08/14/18
|
3325A power supply overheating
I have a 3325A which recently stopped working.? I've traced the problem to a very high load from one particular PCB and will track down the (most likely) bad tantalum.
However, I noticed that the power supply PCB shows signs of overtemperature around the four large diodes.? The board is quite brown.? Even without the problem PCB connected, those diodes as well as the pass transistors on the heatsink run pretty hot.? It looks like repairs have been made in that area by someone else in the past.? The fan seems to be operating normally.? Has anyone else noticed this?
I'm thinking of finding a replacement power supply PCB or buying a parts unit hoping the power supply is in better shape.? Before I go to ebay, does anyone have a parts unit?
Also, the oven oscillator, while close to proper frequency, is showing quite a lot of short term drift, close to 0.5 PPM over the span of minutes, up and down.? While I don't need super precision usually, this is obviously wrong and should also be replaced.
|
I have this slew of PCMCIA FLASH memory cards and I need help in determining which if any will work with my HP8920B. The manuals are not very descriptive and I don't want to damage anything in trying. I have some test programs in battery backed SRAM PCMCIA and would like them on FLASH for long term . Help? Thanks Joe? PS If anything it would be helpful to know which ones not to bother trying.
|
Is the preamp circuit really that different between versions? I would think they'd be close either way. Can you see the oscillations on the output, without any other signals applied? If so, try unplugging the input cable at J1, eliminating any input signal and the cable capacitance, and see if it becomes (at least marginally) stable.
I haven't used or seen the insides of my 11729C in years, so don't recall the looks and accessibility of the modules. Can the preamp be opened up and set up for operation while open, and out in the open for access? If so, then you can use the old pencil trick and poke around the hot nodes to find the sensitive spots. 27 MHz seems rather low for one of these stages to oscillate at - you'd expect something at VHF or up. So, it would likely be due to the preamp's LF feedback loop instability, or in the power amp stage that is much slower. Q6 could maybe use a bead on its base too.
Another possibility is that there are actually two VHF oscillations going on, and the 27 MHz is just one of the mixing products that's in-band for the overall amplifier. If you have a spectrum analyzer handy, try looking at the output, but at way higher frequencies and sensitivities. If nothing shows at the output, try looking at the input, where you may have closer access to any VHF stuff going on in the preamp.
Before digging too deep, it would be good to do a quick check through the stages to be sure the DC bias levels make sense.
You are right to question the PS bypassing arrangement, and try adding some HF bypass caps. However, if these electrolytics are tantalum type (most likely), then they should have good performance even at RF, so the need for extra bypassing is greatly reduced. Worth checking though, just in case.
BTW the schematic I'm looking at says it's A6A1 low noise amplifier board assembly (11729-60009).
Good luck. Ed
|
Re: wanted: HP 70K MMS (hp 70000) software: whole system software, individual module software, ROM software, personality software, etc.)
Does anyone have ?*any* ?HP 70K MMS (HP 70000 system ) ?software to deposit into an Open archive ?
? ?Anyone know of any HP 70K MMS era related HP Engineers, Service Techs, or MMS end-users that can be contacted, that might be able to help ?
Please let us know.
thank you !!
|
hi Chuck,
As a roadmap, how about ?~3 photos ?of the 8656 ?A10 board & C18, with the C18 markings & associated physical space (with a ruler) ?
thank you, rick
|
Yes. I (and everyone else here) uses decibels every day, but isn't it odd that we use 1/10th of a Bel as a "base unit" of sorts? We talk about 0.1dB or 0.01dB all the time, but why not a centiBel or a milliBel?
The common use of 1/10th probably has its roots in telephony (as the unit itself does) for some very real-world reason, but it still seems odd that it took hold.
-Dave
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On 08/25/2018 10:58 AM, Leon Robinson wrote: Lets not forget deci.
Sent from K5JLR
-------- Original message -------- From: Gedas <w8bya@...> Date: 08/25/2018 9:03 AM (GMT-06:00) To: [email protected] Subject: Re: [HP-Agilent-Keysight-equipment] HP 8656B
Hi Brian, do you remember from a long time ago when a 8pF cap would be labeled as a 8 mmF on the schematic.
Gedas, W8BYA
Gallery at Light travels faster than sound.... This is why some people appear bright until you hear them speak.
On 8/25/2018 2:54 AM, Brian wrote:
Hello Dave,
?
I think that avoiding use of mF is for the reason that a long time ago, ie, when I was young, a capacitor marked 8 mF was known to be 8 microFarad. The use of uF is a Johnny come lately, with the emergence of SI multipliers. Easy to write the Greek mu, but not so easy to type on the early QWERTY keyboards with early versions of word-processing software. So, rather than confuse older people, the multiplier m for capacitance is generally avoided.
?
73 de Brian, VK2GCE
?
*From:*[email protected] [mailto:[email protected]] *On Behalf Of *Dr. David Kirkby from Kirkby Microwave Ltd *Sent:* Saturday, 25 August 2018 3:40 PM *To:* [email protected] *Subject:* Re: [HP-Agilent-Keysight-equipment] HP 8656B
?
On Fri, 24 Aug 2018, 06:38 Kuba Ober, <kuba@... <mailto:kuba@...>> wrote:
How big is that cap, size-wise? It¡¯s unlikely to be a supercapacitor for such voltage in anything older than a few years or so, I¡¯d bet. It¡¯s a typo in the PL, and a common use of M for micro. Happens all the time. You¡¯re looking at 24,000uF @ 40V.?
?
It is strange why mF? are rarely used. We use mV, mA, m ohm, mH, mm, but when it comes to capacitors one uses? fF, pF, nF, uF and farads, but rarely mF.?
?
A capacitor of 0.022? F is rarely called 22 mF, but usually 22,000 uF.?
?
When I use my HP 4284A LCR meter, I have to stop and think when it shows a result in mF.?
?
I can only guess at one time capacitors usually had values of less than 1000 uF, so people used uF, and never changed
?
We don't tend to use Mm either. A distance would normally be quoted as 4000 km rather than 4 Mm.?
?
Dave.?
-- Dave McGuire, AK4HZ New Kensington, PA
|
Lets not forget deci.
Sent from K5JLR
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Show quoted text
-------- Original message -------- From: Gedas <w8bya@...> Date: 08/25/2018 9:03 AM (GMT-06:00) To: [email protected] Subject: Re: [HP-Agilent-Keysight-equipment] HP 8656B
Hi Brian, do you remember from a long time ago
when a 8pF cap would be labeled as a 8 mmF on the schematic.
Gedas, W8BYA
Gallery at
Light travels faster than sound....
This is why some people appear bright until you hear them speak.
On 8/25/2018 2:54 AM, Brian wrote:
Hello
Dave,
?
I
think that avoiding use of mF is for the reason that a long
time ago, ie, when I was young, a capacitor marked 8 mF was
known to be 8
microFarad. The use of uF is a Johnny come lately, with the
emergence of SI
multipliers. Easy to write the Greek mu, but not so easy to
type on the early
QWERTY keyboards with early versions of word-processing
software. So, rather than
confuse older people, the multiplier m for capacitance is
generally avoided.
?
73
de Brian, VK2GCE
?
?
On Fri, 24 Aug 2018, 06:38 Kuba
Ober, <kuba@...>
wrote:
How big is that cap,
size-wise? It¡¯s unlikely to be a
supercapacitor for such voltage in anything
older than a few years or so, I¡¯d
bet. It¡¯s a typo in the PL, and a common use
of M for micro. Happens all the
time. You¡¯re looking at 24,000uF @ 40V.?
It is strange why mF? are rarely used.
We use mV, mA, m
ohm, mH, mm, but when it comes to capacitors one uses? fF,
pF, nF, uF and
farads, but rarely mF.?
A capacitor of 0.022? F is rarely
called 22 mF, but
usually 22,000 uF.?
When I use my HP 4284A LCR meter, I
have to stop and think
when it shows a result in mF.?
I can only guess at one time capacitors
usually had values
of less than 1000 uF, so people used uF, and never changed
We don't tend to use Mm either. A
distance would normally be
quoted as 4000 km rather than 4 Mm.?
|
Hi Brian, do you remember from a long time ago
when a 8pF cap would be labeled as a 8 mmF on the schematic.
Gedas, W8BYA
Gallery at
Light travels faster than sound....
This is why some people appear bright until you hear them speak.
On 8/25/2018 2:54 AM, Brian wrote:
toggle quoted message
Show quoted text
Hello
Dave,
?
I
think that avoiding use of mF is for the reason that a long
time ago, ie, when I was young, a capacitor marked 8 mF was
known to be 8
microFarad. The use of uF is a Johnny come lately, with the
emergence of SI
multipliers. Easy to write the Greek mu, but not so easy to
type on the early
QWERTY keyboards with early versions of word-processing
software. So, rather than
confuse older people, the multiplier m for capacitance is
generally avoided.
?
73
de Brian, VK2GCE
?
?
On Fri, 24 Aug 2018, 06:38 Kuba
Ober, <kuba@...>
wrote:
How big is that cap,
size-wise? It¡¯s unlikely to be a
supercapacitor for such voltage in anything
older than a few years or so, I¡¯d
bet. It¡¯s a typo in the PL, and a common use
of M for micro. Happens all the
time. You¡¯re looking at 24,000uF @ 40V.?
It is strange why mF? are rarely used.
We use mV, mA, m
ohm, mH, mm, but when it comes to capacitors one uses? fF,
pF, nF, uF and
farads, but rarely mF.?
A capacitor of 0.022? F is rarely
called 22 mF, but
usually 22,000 uF.?
When I use my HP 4284A LCR meter, I
have to stop and think
when it shows a result in mF.?
I can only guess at one time capacitors
usually had values
of less than 1000 uF, so people used uF, and never changed
We don't tend to use Mm either. A
distance would normally be
quoted as 4000 km rather than 4 Mm.?
|
A 'mil' is also used in US money. It is 1/1000 of a dollar and used for tax rates along with other special transactions.
Michael A. Terrell
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-----Original Message----- From: Adrian <Adrian@...> Sent: Aug 25, 2018 4:22 AM To: [email protected] Subject: Re: [HP-Agilent-Keysight-equipment] HP 8656B
So I am of an age that I grew up using Imperial measures and pre-decimal money. I have also lived and worked both sides of the Atlantic and in most things I am almost bi-lingual!
The one thing that still trips me up (if I'm not careful) is that in the States, in an engineering shop, a request to "take a couple of mil off that face" means they would take off two thousandths of an inch but in a UK shop they would take a couple of millimetres off!
In the UK 1/1000 of an inch is a 'thou', so I guess the use of 'mil' is a hangover from the Roman occupation of North America?
Adrian
|
So I am of an age that I grew up using Imperial measures and pre-decimal money. I have also lived and worked both sides of the Atlantic and in most things I am almost bi-lingual! The one thing that still trips me up (if I'm not careful) is that in the States, in an engineering shop, a request to "take a couple of mil off that face" means they would take off two thousandths of an inch but in a UK shop they would take a couple of millimetres off! In the UK 1/1000 of an inch is a 'thou', so I guess the use of 'mil' is a hangover from the Roman occupation of North America? Adrian On 8/25/2018 12:56 AM, Dave McGuire wrote: ...'cause THAT'S practical in the 20th century..
-Dave M is the Roman numeral for 1000. Dave Wise
|
Hello Dave,
?
I think that avoiding use of mF is for the reason that a long
time ago, ie, when I was young, a capacitor marked 8 mF was known to be 8
microFarad. The use of uF is a Johnny come lately, with the emergence of SI
multipliers. Easy to write the Greek mu, but not so easy to type on the early
QWERTY keyboards with early versions of word-processing software. So, rather than
confuse older people, the multiplier m for capacitance is generally avoided.
?
73 de Brian, VK2GCE
?
toggle quoted message
Show quoted text
From: [email protected]
[mailto:[email protected]] On Behalf Of Dr. David
Kirkby from Kirkby Microwave Ltd
Sent: Saturday, 25 August 2018 3:40 PM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 8656B
?
On Fri, 24 Aug 2018, 06:38 Kuba Ober, <kuba@...> wrote:
How big is that cap, size-wise? It¡¯s unlikely to be a
supercapacitor for such voltage in anything older than a few years or so, I¡¯d
bet. It¡¯s a typo in the PL, and a common use of M for micro. Happens all the
time. You¡¯re looking at 24,000uF @ 40V.?
It is strange why mF? are rarely used. We use mV, mA, m
ohm, mH, mm, but when it comes to capacitors one uses? fF, pF, nF, uF and
farads, but rarely mF.?
A capacitor of 0.022? F is rarely called 22 mF, but
usually 22,000 uF.?
When I use my HP 4284A LCR meter, I have to stop and think
when it shows a result in mF.?
I can only guess at one time capacitors usually had values
of less than 1000 uF, so people used uF, and never changed
We don't tend to use Mm either. A distance would normally be
quoted as 4000 km rather than 4 Mm.?
|
Dr. David Kirkby from Kirkby Microwave Ltd
On Fri, 24 Aug 2018, 06:38 Kuba Ober, < kuba@...> wrote:
How big is that cap, size-wise? It¡¯s unlikely to be a supercapacitor for such voltage in anything older than a few years or so, I¡¯d bet. It¡¯s a typo in the PL, and a common use of M for micro. Happens all the time. You¡¯re looking at 24,000uF @ 40V.?
It is strange why mF? are rarely used. We use mV, mA, m ohm, mH, mm, but when it comes to capacitors one uses? fF, pF, nF, uF and farads, but rarely mF.?
A capacitor of 0.022? F is rarely called 22 mF, but usually 22,000 uF.?
When I use my HP 4284A LCR meter, I have to stop and think when it shows a result in mF.?
I can only guess at one time capacitors usually had values of less than 1000 uF, so people used uF, and never changed
We don't tend to use Mm either. A distance would normally be quoted as 4000 km rather than 4 Mm.?
Dave.?
|
On 08/24/2018 08:34 PM, Harvey White wrote: I never did understand the point of the 0F13 notation and have never particular cared for it. Arbitrarily moving the units into the decimal position seems like a very random thing to do. one of the difficulties with the 0.xxx notation is leaving off the zero, or watching the decimal point go away under a bit of use.
Sure, I can't disagree with that. The advantage is that the decimal separator is kinda obvious. It's actually easier to look at an SMD resistor and read it if it were using the #R# notation. Yebbut...moving the unit there? Why not just replace the period with something more visible? Even 'X' would do. Even '/'. But don't move the unit...that belongs to the right of the number. On the other hand, a lot of it is what you're used to. Yes, mostly. -Dave -- Dave McGuire, AK4HZ New Kensington, PA
|
On Fri, 24 Aug 2018 16:25:05 -0400, you wrote: On 08/24/2018 09:13 AM, Kuba Ober wrote:
I somehow didn¡¯t run into the xxxF notation, where the first digit is 10^-1. Writing 13mF as 013F would be be IMHO crazy. I¡¯d understand 0F13. But of course I didn¡¯t notice the decimal point in front of the zero in Chuck McC¡¯s post ¡ª he seemingly was aware that it was not 13F, perhaps. Only one mention had the correct scaling. I think that in this day and age, all electrolytics can afford to have the capacity written in SI units with international standard scale suffixes. With a zero leading the decimal point, if applicable. It¡¯s extremely easy to misread, say .200F as 200F :) Especially after a long day. I imagine over the years some lives and/or lots of money must have been lost to mishaps of that kind. A space probe, even :) I never did understand the point of the 0F13 notation and have never particular cared for it. Arbitrarily moving the units into the decimal position seems like a very random thing to do. one of the difficulties with the 0.xxx notation is leaving off the zero, or watching the decimal point go away under a bit of use. The advantage is that the decimal separator is kinda obvious. It's actually easier to look at an SMD resistor and read it if it were using the #R# notation. On the other hand, a lot of it is what you're used to. Harvey But a leading zero makes 0.013F pretty readable, IMO.
The real problems come in, as Chuck pointed out, when the industry does things like "MFD". Gads am I glad those days are over!
-Dave
|
...'cause THAT'S practical in the 20th century..
-Dave
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Show quoted text
On 08/24/2018 07:46 PM, Dave Wise wrote: M is the Roman numeral for 1000.
Dave Wise
On Aug 24, 2018, at 4:29 PM, Peter Gottlieb <hpnpilot@...> wrote:
This is also done in finance where M is 1000 and MM is million. Really odd!
On 8/24/2018 7:19 PM, Brad Thompson wrote:
On 8/24/2018 4:25 PM, Dave McGuire wrote: <snip> I never did understand the point of the 0F13 notation and have never particular cared for it. Arbitrarily moving the units into the decimal position seems like a very random thing to do.
But a leading zero makes 0.013F pretty readable, IMO.
The real problems come in, as Chuck pointed out, when the industry does things like "MFD". Gads am I glad those days are over! Hello--
Another pitfall from the "good old days" awaits the beginning restorer or repairer who examines the schematics of certain older (tubed) radios. Some manufacturers used "M" as a multiplier of 1,000 in resistor values.
For example, I'm looking at a schematic for a 1930s Grunow model 1291 receiver in which various resistors sport labels of "ohms", "M" and "megohms".
Fortunately, a little knowledge of circuit design would tell you that using a 47M (megohm) plate resistor in an audio-amplifier stage would be highly unlikely.
73--
Brad AA1IP
-- Dave McGuire, AK4HZ New Kensington, PA
|
M is the Roman numeral for 1000.
Dave Wise
toggle quoted message
Show quoted text
On Aug 24, 2018, at 4:29 PM, Peter Gottlieb <hpnpilot@...> wrote:
This is also done in finance where M is 1000 and MM is million. Really odd!
On 8/24/2018 7:19 PM, Brad Thompson wrote:
On 8/24/2018 4:25 PM, Dave McGuire wrote: <snip> I never did understand the point of the 0F13 notation and have never particular cared for it. Arbitrarily moving the units into the decimal position seems like a very random thing to do.
But a leading zero makes 0.013F pretty readable, IMO.
The real problems come in, as Chuck pointed out, when the industry does things like "MFD". Gads am I glad those days are over! Hello--
Another pitfall from the "good old days" awaits the beginning restorer or repairer who examines the schematics of certain older (tubed) radios. Some manufacturers used "M" as a multiplier of 1,000 in resistor values.
For example, I'm looking at a schematic for a 1930s Grunow model 1291 receiver in which various resistors sport labels of "ohms", "M" and "megohms".
Fortunately, a little knowledge of circuit design would tell you that using a 47M (megohm) plate resistor in an audio-amplifier stage would be highly unlikely.
73--
Brad AA1IP
|