Re: Mean Well, etc, PSUs - was(Re: [HP-Agilent-Keysight-equipment] HP 3325A power supply repair)
By now that means you should not be buying computers, phones etc. Everything but the kitchen sink is produced in China these days.
Anyway, way OT, lets get back to our beloved T&M kit..
Wilko
|
Re: Mean Well, etc, PSUs - was(Re: [HP-Agilent-Keysight-equipment] HP 3325A power supply repair)
Dan,
??? NO! But the whole system and all of my cards are for sale. I am
dying and I would like to sell all of my electronics to someone
before I am buried. Otherwise it will probably end up in the land
fill.
GOD Bless and Thanks,
rich!
On 9/16/2020 1:47 AM, Daniel Nelson
wrote:
toggle quoted message
Show quoted text
Richard:
Wow...S-100....
Need any Northstar Horizons or Altair Attache's
Dan in Chandler, AZ
|
Re: Mean Well, etc, PSUs - was(Re: [HP-Agilent-Keysight-equipment] HP 3325A power supply repair)
Richard:
Wow...S-100....
Need any Northstar Horizons or Altair Attache's
Dan in Chandler, AZ
|
Testconnector for Motorola portable 2way radios. Screws into the antennaconnector obviously.
Wilko
PA1WBU
|
Re: Mean Well, etc, PSUs - was(Re: [HP-Agilent-Keysight-equipment] HP 3325A power supply repair)
Jim,
??? I would have to look but I believe that these were made here in
the USA. I also won't buy stuff from China. A sworn enemy of ours.
Makes it very difficult at times. I also don't shop at Walmart or
Target for the same reasons. I support my local stores as much as
possible.
GOD Bless and Thanks,
rich!
On 9/16/2020 12:10 AM, Jim Ford wrote:
toggle quoted message
Show quoted text
I am glad they are working out well for you, Rich.? I assume
the name is a Chinese company's not so successful attempt at
cracking the US market.? As for me, I refuse to buy anything
from China, and I encourage others to do so as well.
Jim
Sent from my
Verizon, Samsung Galaxy smartphone
-------- Original message --------
Date: 9/15/20 9:41 PM (GMT-08:00)
Subject: Re: Mean Well, etc, PSUs - was(Re:
[HP-Agilent-Keysight-equipment] HP 3325A power supply repair)
Jim,
??? That is a good one. I have three Mean Well Supplies that I use
to power a S-100 system and I am happy with them.
GOD Bless and Thanks,
rich!
???
On 9/15/2020 11:38 PM, Jim Ford
wrote:
I don't know about you, but Mean Well always makes me think
of the proverb "The road to Hell is paved with good
intentions."!
Jim Ford?
Sent from
my Verizon, Samsung Galaxy smartphone
-------- Original message --------
Date: 9/15/20 9:14 PM (GMT-08:00)
Subject: Mean Well, etc, PSUs - was(Re:
[HP-Agilent-Keysight-equipment] HP 3325A power supply
repair)
Hello Folks,
sorry for making a nuissance of myself, but I have heard of
similar substitutions being done.
I know of a fact that someone at EEVblog used a set of Mean
Well PSUs on a 53310A. My ex lab gypsy swears her hands that a
friend of her did something similar to a Danaher AWG2021 (two
channel model) which the friend did not want to give up on.
IMHO, it is possible. But most of these conversions I have
seen had the Mean Well bricks outside, as a sort of "power
system", and only a small box with LC filters inside the TMI.
Also, the usual caveats apply:
Mean Well is probably the most faked brand of PSU in the
world...
Tam
With best regards
Tam HANNA
|
Re: Mean Well, etc, PSUs - was(Re: [HP-Agilent-Keysight-equipment] HP 3325A power supply repair)
I am glad they are working out well for you, Rich.? I assume the name is a Chinese company's not so successful attempt at cracking the US market.? As for me, I refuse to buy anything from China, and I encourage others to do so as well.
Jim
Sent from my Verizon, Samsung Galaxy smartphone
toggle quoted message
Show quoted text
-------- Original message -------- From: "Richard R. Pope" <mechanic_2@...> Date: 9/15/20 9:41 PM (GMT-08:00) Subject: Re: Mean Well, etc, PSUs - was(Re: [HP-Agilent-Keysight-equipment] HP 3325A power supply repair)
Jim,
??? That is a good one. I have three Mean Well Supplies that I use
to power a S-100 system and I am happy with them.
GOD Bless and Thanks,
rich!
???
On 9/15/2020 11:38 PM, Jim Ford wrote:
I don't know about you, but Mean Well always makes me think
of the proverb "The road to Hell is paved with good
intentions."!
Jim Ford?
Sent from my
Verizon, Samsung Galaxy smartphone
-------- Original message --------
Date: 9/15/20 9:14 PM (GMT-08:00)
Subject: Mean Well, etc, PSUs - was(Re:
[HP-Agilent-Keysight-equipment] HP 3325A power supply repair)
Hello Folks,
sorry for making a nuissance of myself, but I have heard of
similar substitutions being done.
I know of a fact that someone at EEVblog used a set of Mean
Well PSUs on a 53310A. My ex lab gypsy swears her hands that a
friend of her did something similar to a Danaher AWG2021 (two
channel model) which the friend did not want to give up on.
IMHO, it is possible. But most of these conversions I have seen
had the Mean Well bricks outside, as a sort of "power system",
and only a small box with LC filters inside the TMI. Also, the
usual caveats apply:
Mean Well is probably the most faked brand of PSU in the
world...
Tam
With best regards
Tam HANNA
|
Re: Mean Well, etc, PSUs - was(Re: [HP-Agilent-Keysight-equipment] HP 3325A power supply repair)
Jim,
??? That is a good one. I have three Mean Well Supplies that I use
to power a S-100 system and I am happy with them.
GOD Bless and Thanks,
rich!
???
On 9/15/2020 11:38 PM, Jim Ford wrote:
toggle quoted message
Show quoted text
I don't know about you, but Mean Well always makes me think
of the proverb "The road to Hell is paved with good
intentions."!
Jim Ford?
Sent from my
Verizon, Samsung Galaxy smartphone
-------- Original message --------
Date: 9/15/20 9:14 PM (GMT-08:00)
Subject: Mean Well, etc, PSUs - was(Re:
[HP-Agilent-Keysight-equipment] HP 3325A power supply repair)
Hello Folks,
sorry for making a nuissance of myself, but I have heard of
similar substitutions being done.
I know of a fact that someone at EEVblog used a set of Mean
Well PSUs on a 53310A. My ex lab gypsy swears her hands that a
friend of her did something similar to a Danaher AWG2021 (two
channel model) which the friend did not want to give up on.
IMHO, it is possible. But most of these conversions I have seen
had the Mean Well bricks outside, as a sort of "power system",
and only a small box with LC filters inside the TMI. Also, the
usual caveats apply:
Mean Well is probably the most faked brand of PSU in the
world...
Tam
With best regards
Tam HANNA
|
Re: Mean Well, etc, PSUs - was(Re: [HP-Agilent-Keysight-equipment] HP 3325A power supply repair)
I don't know about you, but Mean Well always makes me think of the proverb "The road to Hell is paved with good intentions."!
Jim Ford?
Sent from my Verizon, Samsung Galaxy smartphone
toggle quoted message
Show quoted text
-------- Original message -------- From: Tam Hanna <tamhan@...> Date: 9/15/20 9:14 PM (GMT-08:00) Subject: Mean Well, etc, PSUs - was(Re: [HP-Agilent-Keysight-equipment] HP 3325A power supply repair)
Hello Folks,
sorry for making a nuissance of myself, but I have heard of
similar substitutions being done.
I know of a fact that someone at EEVblog used a set of Mean Well
PSUs on a 53310A. My ex lab gypsy swears her hands that a friend
of her did something similar to a Danaher AWG2021 (two channel
model) which the friend did not want to give up on.
IMHO, it is possible. But most of these conversions I have seen
had the Mean Well bricks outside, as a sort of "power system", and
only a small box with LC filters inside the TMI. Also, the usual
caveats apply:
Mean Well is probably the most faked brand of PSU in the world...
Tam
With best regards
Tam HANNA
Enjoy electronics? Join 15k7 other followers by visiting the Crazy Electronics Lab at
On 2020. 09. 16. 4:24, Michael A.
Terrell wrote:
Has anyone ever tried installing a switching supply
in a 3325A/B?
On Tue, Sep 15, 2020 at 10:22
PM Mike Feher < n4fs@...> wrote:
Hi Kuba –
?
Well I guess this is off topic, but
I am surprised someone even recognized the MF10. I had
to be on the phone with the National design engineers
as I was blowing them up. They told me that on the
early ones I had to sequence the power on them. They
eventually put out a little book on the part. They
sent me a preliminary copy. I used them to design
elliptic filters since in those I can have control of
where the zeroes go and they have the best or
narrowest transition band. They worked great and we
provided a couple of them to the Navy. BTW, your books
are still waiting for you. Regards – Mike
?
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell NJ 07731
848-245-9115
?
?
Oh wow - MF10. What a cool part! I
used it in various instrumentation jobs. Another one
that I still use is the switched cap building block
LTC1043 – it did things that were thard to do
otherwise, but opamps got really good these days so it
finds only niche use. But when you need it - it’s
great.
15
sep. 2020 kl. 2:18 em skrev Mike Feher <n4fs@...>:
?
I purchased a brand new 3325A
from HP back in 1983 or so for a company where I
was director of Engineering. I was designing
switched capacitor digital filters then using the
National MF10 devices. Regardless after I resigned
from that company, their engineering dept.
dissolved and they called me and asked if I wanted
to buy the TE that now they were no longer using.
Sure, I bought a truckload for $1000 including the
3325A. The generator worked flawlessly for years
and then started having problems. I eventually had
to look inside it and found a manufacturing
problem. There was an inline Molex style connector
from the PS to the rest of the gen. One of the
contacts was not crimped well enough and over
years of high resistance overheating, melted the
connector. Lucky for me, a simple fix. Regards –
Mike
?
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell NJ 07731
848-245-9115
?
|
Mean Well, etc, PSUs - was(Re: [HP-Agilent-Keysight-equipment] HP 3325A power supply repair)
Hello Folks,
sorry for making a nuissance of myself, but I have heard of
similar substitutions being done.
I know of a fact that someone at EEVblog used a set of Mean Well
PSUs on a 53310A. My ex lab gypsy swears her hands that a friend
of her did something similar to a Danaher AWG2021 (two channel
model) which the friend did not want to give up on.
IMHO, it is possible. But most of these conversions I have seen
had the Mean Well bricks outside, as a sort of "power system", and
only a small box with LC filters inside the TMI. Also, the usual
caveats apply:
Mean Well is probably the most faked brand of PSU in the world...
Tam
With best regards
Tam HANNA
Enjoy electronics? Join 15k7 other followers by visiting the Crazy Electronics Lab at
On 2020. 09. 16. 4:24, Michael A.
Terrell wrote:
toggle quoted message
Show quoted text
Has anyone ever tried installing a switching supply
in a 3325A/B?
On Tue, Sep 15, 2020 at 10:22
PM Mike Feher < n4fs@...> wrote:
Hi Kuba –
?
Well I guess this is off topic, but
I am surprised someone even recognized the MF10. I had
to be on the phone with the National design engineers
as I was blowing them up. They told me that on the
early ones I had to sequence the power on them. They
eventually put out a little book on the part. They
sent me a preliminary copy. I used them to design
elliptic filters since in those I can have control of
where the zeroes go and they have the best or
narrowest transition band. They worked great and we
provided a couple of them to the Navy. BTW, your books
are still waiting for you. Regards – Mike
?
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell NJ 07731
848-245-9115
?
?
Oh wow - MF10. What a cool part! I
used it in various instrumentation jobs. Another one
that I still use is the switched cap building block
LTC1043 – it did things that were thard to do
otherwise, but opamps got really good these days so it
finds only niche use. But when you need it - it’s
great.
15
sep. 2020 kl. 2:18 em skrev Mike Feher <n4fs@...>:
?
I purchased a brand new 3325A
from HP back in 1983 or so for a company where I
was director of Engineering. I was designing
switched capacitor digital filters then using the
National MF10 devices. Regardless after I resigned
from that company, their engineering dept.
dissolved and they called me and asked if I wanted
to buy the TE that now they were no longer using.
Sure, I bought a truckload for $1000 including the
3325A. The generator worked flawlessly for years
and then started having problems. I eventually had
to look inside it and found a manufacturing
problem. There was an inline Molex style connector
from the PS to the rest of the gen. One of the
contacts was not crimped well enough and over
years of high resistance overheating, melted the
connector. Lucky for me, a simple fix. Regards –
Mike
?
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell NJ 07731
848-245-9115
?
|
Re: HP 3325A power supply repair
Yes Dave, I can see how it can seem to be complex to a teenager. At the time I was in my late 30’s and all I had to do was come up with the transfer functions for the filters that I wanted. In the late 60’s for my senior project for my undergraduate EE degree I built a switched capacitor filter using discrete logic. Regards – Mike ? Mike B. Feher, N4FS 89 Arnold Blvd. Howell NJ 07731 848-245-9115 ?
toggle quoted message
Show quoted text
-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Dave McGuire
Sent: Tuesday, September 15, 2020 10:27 PM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 3325A power supply repair ? ? ?? They weren't THAT obscure.? Radio Shack sold them in blister packs back in the day.? I put one on a breadboard when I was a teen just to mess with...definitely complex but it sure was neat to study. ? ????????????? -Dave ?
|
|
|
I think it looks like this:?
On Tuesday, September 15, 2020, 10:22:40 PM EDT, Michael A. Terrell <terrell.michael.a@...> wrote:
No problem. That is a common error. The one that bugs me is calling DE9 connectors, DB9. D is the series, and the second letter is the shell size. The 'B' shell was designed for 25 pins, not nine. Cannon created the series, and named them. I figure that people who advertise DB9 connectors for sale don't know anything about their products, so I buy them from someone who does. Using the wrong names makes it much harder to track down obsolete or obscure connectors.
I agree about the use of xPxC names for modular connectors.
The 8P8C was also used for hard wired alarm systems as the RJ31X to seize a phone line in an emergency. A real 8P8C connector for RJ45 won't plug into an Ethernet port, because it has a keyway molded on the side to keep it from being used in the wrong connector. The RJ45 also contains a resistor to set the gain for that interface. RJ is the Bell System standards for wiring the connectors for various uses, not the connectors themselves. I have some NOS keyed RJ45 cables that I have never found a use for. I doubt they are in good shape after being in a box for over 20 years.
Yes, you are right Michael, phone connectors, not phono connectors. I
incorrectly copied the word from the previous message in the thread
without thinking.
My (personal) parlance:
phono connectors => "rca jacks / plugs"
1/4" phone connectors => "big headphone" or "jack cable" or
"instrument (musical) cable" depending on context
3.5mm phone connectors => "headphone"
2.5mm phone connectors => "F*[]#@ stupid small headphone - why did
they use this stupid crap, now I need to find an adapter :("
I also commit the routine travesty of calling an 8P8C connector a
"RJ45", anything that fits into a phone jack is an RJ11 (regardless of
whether it has 2, 4, or 6 conductors), and a 4P4C is a "handset
connector" - I can feel the wrath coming already.
Don't even get me started on SMA / 3.5mm / 2.92mm / etc...
On Tue, Sep 15, 2020 at 4:55 PM Michael A. Terrell
<terrell.michael.a@...> wrote:
>
> Andrew, those are phone, not phono. Phono plugs are used for turntables and low end audio equipment. One connector per channel, since RCA developed them to connect their stand alone 45RPM turntable to an input on a table radio. They are all just a shield and one contact. There are some variations, like a longer center pin, and Switchcraft made some jacks with a switch to use to short an unused input or disconnect an internal speaker. This is a phono plug:.
>
> On Tue, Sep 15, 2020 at 5:50 PM Andrew Hakman <andrew.hakman@...> wrote:
>>
>> There are 2.5mm phono jacks - they're just not as common as 3.5mm
>> ones. You find them on odd things, usually where they want you to buy
>> a custom cable
>>
>> i.e. TI graphing calculator serial cable connectors on the calculator
>> is one of few places I've run into them
>>
>> Some ancient tape recorders use them for the microphone connectors so
>> you couldn't use a standard microphone with the tape recorder.
>>
>> Threaded phono jacks are common on headphones, where there's an
>> adapter that threads on to go from 3.5mm to 6.35mm (1/4")
>>
>>
>> Threaded 2.5mm phono jacks, definitely less common, but probably
>> intended for the same reason, so the threads take the mechanical
>> stress, and provide resistance from the plug just pulling out of the
>> phono jack.
>>
>> On Tue, Sep 15, 2020 at 2:17 PM Emanuele Girlando via
>> <emanuele_girlando=[email protected]> wrote:
>> >
>> > ...but it is threaded at the bottom. The rod external diameter is 2.5mm while Phono jacks are 3.5mm....
>> > No, it is not a phono jack!
>> >
>>
>>
>>
>>
>>
>
|
Re: HP 3325A power supply repair
They weren't THAT obscure. Radio Shack sold them in blister packs back in the day. I put one on a breadboard when I was a teen just to mess with...definitely complex but it sure was neat to study.
-Dave
toggle quoted message
Show quoted text
On 9/15/20 10:22 PM, Mike Feher wrote: Well I guess this is off topic, but I am surprised someone even recognized the MF10. I had to be on the phone with the National design engineers as I was blowing them up. They told me that on the early ones I had to sequence the power on them. They eventually put out a little book on the part. They sent me a preliminary copy. I used them to design elliptic filters since in those I can have control of where the zeroes go and they have the best or narrowest transition band. They worked great and we provided a couple of them to the Navy. BTW, your books are still waiting for you. Regards – Mike
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell NJ 07731
848-245-9115
*From:* [email protected] <[email protected]> *On Behalf Of *Kuba Ober
*Sent:* Tuesday, September 15, 2020 9:59 PM
*To:* [email protected]
*Subject:* Re: [HP-Agilent-Keysight-equipment] HP 3325A power supply repair
Oh wow - MF10. What a cool part! I used it in various instrumentation jobs. Another one that I still use is the switched cap building block LTC1043 – it did things that were thard to do otherwise, but opamps got really good these days so it finds only niche use. But when you need it - it’s great.
Cheers, Kuba
15 sep. 2020 kl. 2:18 em skrev Mike Feher <n4fs@...
<mailto:n4fs@...>>:
?
I purchased a brand new 3325A from HP back in 1983 or so for a
company where I was director of Engineering. I was designing
switched capacitor digital filters then using the National MF10
devices. Regardless after I resigned from that company, their
engineering dept. dissolved and they called me and asked if I wanted
to buy the TE that now they were no longer using. Sure, I bought a
truckload for $1000 including the 3325A. The generator worked
flawlessly for years and then started having problems. I eventually
had to look inside it and found a manufacturing problem. There was
an inline Molex style connector from the PS to the rest of the gen.
One of the contacts was not crimped well enough and over years of
high resistance overheating, melted the connector. Lucky for me, a
simple fix. Regards – Mike
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell NJ 07731
848-245-9115
--
Dave McGuire, AK4HZ
New Kensington, PA
|
Re: HP 3325A power supply repair
Has anyone ever tried installing a switching supply in a 3325A/B?
On Tue, Sep 15, 2020 at 10:22 PM Mike Feher < n4fs@...> wrote: Hi Kuba – ? Well I guess this is off topic, but I am surprised someone even recognized the MF10. I had to be on the phone with the National design engineers as I was blowing them up. They told me that on the early ones I had to sequence the power on them. They eventually put out a little book on the part. They sent me a preliminary copy. I used them to design elliptic filters since in those I can have control of where the zeroes go and they have the best or narrowest transition band. They worked great and we provided a couple of them to the Navy. BTW, your books are still waiting for you. Regards – Mike ? Mike B. Feher, N4FS 89 Arnold Blvd. Howell NJ 07731 848-245-9115 ? ? Oh wow - MF10. What a cool part! I used it in various instrumentation jobs. Another one that I still use is the switched cap building block LTC1043 – it did things that were thard to do otherwise, but opamps got really good these days so it finds only niche use. But when you need it - it’s great.
15 sep. 2020 kl. 2:18 em skrev Mike Feher <n4fs@...>:
? I purchased a brand new 3325A from HP back in 1983 or so for a company where I was director of Engineering. I was designing switched capacitor digital filters then using the National MF10 devices. Regardless after I resigned from that company, their engineering dept. dissolved and they called me and asked if I wanted to buy the TE that now they were no longer using. Sure, I bought a truckload for $1000 including the 3325A. The generator worked flawlessly for years and then started having problems. I eventually had to look inside it and found a manufacturing problem. There was an inline Molex style connector from the PS to the rest of the gen. One of the contacts was not crimped well enough and over years of high resistance overheating, melted the connector. Lucky for me, a simple fix. Regards – Mike ? Mike B. Feher, N4FS 89 Arnold Blvd. Howell NJ 07731 848-245-9115 ?
|
Re: HP 3325A power supply repair
Hi Kuba – ? Well I guess this is off topic, but I am surprised someone even recognized the MF10. I had to be on the phone with the National design engineers as I was blowing them up. They told me that on the early ones I had to sequence the power on them. They eventually put out a little book on the part. They sent me a preliminary copy. I used them to design elliptic filters since in those I can have control of where the zeroes go and they have the best or narrowest transition band. They worked great and we provided a couple of them to the Navy. BTW, your books are still waiting for you. Regards – Mike ? Mike B. Feher, N4FS 89 Arnold Blvd. Howell NJ 07731 848-245-9115 ?
toggle quoted message
Show quoted text
From: [email protected] < [email protected]> On Behalf Of Kuba Ober Sent: Tuesday, September 15, 2020 9:59 PM To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] HP 3325A power supply repair ? Oh wow - MF10. What a cool part! I used it in various instrumentation jobs. Another one that I still use is the switched cap building block LTC1043 – it did things that were thard to do otherwise, but opamps got really good these days so it finds only niche use. But when you need it - it’s great.
15 sep. 2020 kl. 2:18 em skrev Mike Feher <n4fs@...>:
? I purchased a brand new 3325A from HP back in 1983 or so for a company where I was director of Engineering. I was designing switched capacitor digital filters then using the National MF10 devices. Regardless after I resigned from that company, their engineering dept. dissolved and they called me and asked if I wanted to buy the TE that now they were no longer using. Sure, I bought a truckload for $1000 including the 3325A. The generator worked flawlessly for years and then started having problems. I eventually had to look inside it and found a manufacturing problem. There was an inline Molex style connector from the PS to the rest of the gen. One of the contacts was not crimped well enough and over years of high resistance overheating, melted the connector. Lucky for me, a simple fix. Regards – Mike ? Mike B. Feher, N4FS 89 Arnold Blvd. Howell NJ 07731 848-245-9115 ?
|
No problem. That is a common error. The one that bugs me is calling DE9 connectors, DB9. D is the series, and the second letter is the shell size. The 'B' shell was designed for 25 pins, not nine. Cannon created the series, and named them. I figure that people who advertise DB9 connectors for sale don't know anything about their products, so I buy them from someone who does. Using the wrong names makes it much harder to track down obsolete or obscure connectors.
I agree about the use of xPxC names for modular connectors.
The 8P8C was also used for hard wired alarm systems as the RJ31X to seize a phone line in an emergency. A real 8P8C connector for RJ45 won't plug into an Ethernet port, because it has a keyway molded on the side to keep it from being used in the wrong connector. The RJ45 also contains a resistor to set the gain for that interface. RJ is the Bell System standards for wiring the connectors for various uses, not the connectors themselves. I have some NOS keyed RJ45 cables that I have never found a use for. I doubt they are in good shape after being in a box for over 20 years.
Yes, you are right Michael, phone connectors, not phono connectors. I
incorrectly copied the word from the previous message in the thread
without thinking.
My (personal) parlance:
phono connectors => "rca jacks / plugs"
1/4" phone connectors => "big headphone" or "jack cable" or
"instrument (musical) cable" depending on context
3.5mm phone connectors => "headphone"
2.5mm phone connectors => "F*[]#@ stupid small headphone - why did
they use this stupid crap, now I need to find an adapter :("
I also commit the routine travesty of calling an 8P8C connector a
"RJ45", anything that fits into a phone jack is an RJ11 (regardless of
whether it has 2, 4, or 6 conductors), and a 4P4C is a "handset
connector" - I can feel the wrath coming already.
Don't even get me started on SMA / 3.5mm / 2.92mm / etc...
On Tue, Sep 15, 2020 at 4:55 PM Michael A. Terrell
<terrell.michael.a@...> wrote:
>
> Andrew, those are phone, not phono. Phono plugs are used for turntables and low end audio equipment. One connector per channel, since RCA developed them to connect their stand alone 45RPM turntable to an input on a table radio. They are all just a shield and one contact. There are some variations, like a longer center pin, and Switchcraft made some jacks with a switch to use to short an unused input or disconnect an internal speaker. This is a phono plug:.
>
> On Tue, Sep 15, 2020 at 5:50 PM Andrew Hakman <andrew.hakman@...> wrote:
>>
>> There are 2.5mm phono jacks - they're just not as common as 3.5mm
>> ones. You find them on odd things, usually where they want you to buy
>> a custom cable
>>
>> i.e. TI graphing calculator serial cable connectors on the calculator
>> is one of few places I've run into them
>>
>> Some ancient tape recorders use them for the microphone connectors so
>> you couldn't use a standard microphone with the tape recorder.
>>
>> Threaded phono jacks are common on headphones, where there's an
>> adapter that threads on to go from 3.5mm to 6.35mm (1/4")
>>
>>
>> Threaded 2.5mm phono jacks, definitely less common, but probably
>> intended for the same reason, so the threads take the mechanical
>> stress, and provide resistance from the plug just pulling out of the
>> phono jack.
>>
>> On Tue, Sep 15, 2020 at 2:17 PM Emanuele Girlando via
>> <emanuele_girlando=[email protected]> wrote:
>> >
>> > ...but it is threaded at the bottom. The rod external diameter is 2.5mm while Phono jacks are 3.5mm....
>> > No, it is not a phono jack!
>> >
>>
>>
>>
>>
>>
>
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Re: HP 3325A power supply repair
Oh wow - MF10. What a cool part! I used it in various instrumentation jobs. Another one that I still use is the switched cap building block LTC1043 – it did things that were thard to do otherwise, but opamps got really good these days so it finds only niche use. But when you need it - it’s great.
Cheers, Kuba
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15 sep. 2020 kl. 2:18 em skrev Mike Feher <n4fs@...>:
? I purchased a brand new 3325A from HP back in 1983 or so for a company where I was director of Engineering. I was designing switched capacitor digital filters then using the National MF10 devices. Regardless after I resigned from that company, their engineering dept. dissolved and they called me and asked if I wanted to buy the TE that now they were no longer using. Sure, I bought a truckload for $1000 including the 3325A. The generator worked flawlessly for years and then started having problems. I eventually had to look inside it and found a manufacturing problem. There was an inline Molex style connector from the PS to the rest of the gen. One of the contacts was not crimped well enough and over years of high resistance overheating, melted the connector. Lucky for me, a simple fix. Regards – Mike ? Mike B. Feher, N4FS 89 Arnold Blvd. Howell NJ 07731 848-245-9115 ? -----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Toby
Sent: Tuesday, September 15, 2020 12:36 PM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 3325A power supply repair ? On 2020-09-15 8:28 a.m., Martin wrote: > Hi all, > ? > I had an 3325A on the bench that started acting up some years ago. The > display freezes after some time and required a power cycle to get > working again - looked like something wrong in the digital section. > Since I had a signature analyzer I decided to play with it and started > off with the very first signatures to be taken when suddenly the unit > switched off. Totally off. Fuse blown. > > No big deal I thought, but weird - couldn't remember having touched > anything when it happened.?With a new fuse and my IR-cam I quickly > located a bridge rectifier that had a shorted diode (and another one > open). ... After some try and errorr the unit came to live and, to my > surprise, seems to work perfectly. I no longer get any freezes of the > digital part!
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Hi, this is my first post here,
the connector you own, is an external antenna adapter for Motorola Talkie, type GP300 , and some other models,
where the rubber antenna connector is made for this adaptator, i have some, from the time where i was working
at a Motorola dearler....et voila!
all the best, take care, Jean-Jacques F6HTG from France.
? *=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=* 'L'opinion est quelque chose d'intermédiaire entre la connaissance et l'ignorance'
-Platon-
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envoyé : 15 septembre 2020 à 22:49
de : "Emanuele Girlando via groups.io" <emanuele_girlando@...>
à : [email protected]
objet : [HP-Agilent-Keysight-equipment] OT: BNC to WHAT?!
I've encountered this adapter from BNC-F to a kind of RF connector I haven't ever seen before.
Can you guys help me in identifying it?
Thanks.
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Re: HP 3325A power supply repair
Yep, my experience w/ Molex as well.? Amp/Tyco/TEConnectivity much higher quality.?
Jim Ford?
Sent from my Verizon, Samsung Galaxy smartphone
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-------- Original message -------- From: Mike Vande Voort <mike@...> Date: 9/15/20 4:22 PM (GMT-08:00) Subject: Re: [HP-Agilent-Keysight-equipment] HP 3325A power supply repair
Ditto Molex, at least they let you know when they've had enough, to me not a suitable connector for lots of things, but cheap, responsible for billions of intermittent connections On Tue, Sep 15, 2020, 6:04 PM Daniel Nelson < djn@...> wrote: Mike:
FYI: In the 3325A, that connector, on the power supply, often has overheated pins that turn into problems. I have seen quite a few of the Molex connector housings just turned brown or so brittle they crumbled. It is a good idea for owners to check that connector as it is a failure waiting to happen with lots of these fine generators...
Dan in Chandler, AZ
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Yes, you are right Michael, phone connectors, not phono connectors. I incorrectly copied the word from the previous message in the thread without thinking. My (personal) parlance: phono connectors => "rca jacks / plugs" 1/4" phone connectors => "big headphone" or "jack cable" or "instrument (musical) cable" depending on context 3.5mm phone connectors => "headphone" 2.5mm phone connectors => "F*[]#@ stupid small headphone - why did they use this stupid crap, now I need to find an adapter :(" I also commit the routine travesty of calling an 8P8C connector a "RJ45", anything that fits into a phone jack is an RJ11 (regardless of whether it has 2, 4, or 6 conductors), and a 4P4C is a "handset connector" - I can feel the wrath coming already. Don't even get me started on SMA / 3.5mm / 2.92mm / etc... On Tue, Sep 15, 2020 at 4:55 PM Michael A. Terrell <terrell.michael.a@...> wrote:
Andrew, those are phone, not phono. Phono plugs are used for turntables and low end audio equipment. One connector per channel, since RCA developed them to connect their stand alone 45RPM turntable to an input on a table radio. They are all just a shield and one contact. There are some variations, like a longer center pin, and Switchcraft made some jacks with a switch to use to short an unused input or disconnect an internal speaker. This is a phono plug:.
On Tue, Sep 15, 2020 at 5:50 PM Andrew Hakman <andrew.hakman@...> wrote:
There are 2.5mm phono jacks - they're just not as common as 3.5mm
ones. You find them on odd things, usually where they want you to buy
a custom cable
i.e. TI graphing calculator serial cable connectors on the calculator
is one of few places I've run into them
Some ancient tape recorders use them for the microphone connectors so
you couldn't use a standard microphone with the tape recorder.
Threaded phono jacks are common on headphones, where there's an
adapter that threads on to go from 3.5mm to 6.35mm (1/4")
Threaded 2.5mm phono jacks, definitely less common, but probably
intended for the same reason, so the threads take the mechanical
stress, and provide resistance from the plug just pulling out of the
phono jack.
On Tue, Sep 15, 2020 at 2:17 PM Emanuele Girlando via groups.io
<emanuele_girlando@...> wrote:
...but it is threaded at the bottom. The rod external diameter is 2.5mm while Phono jacks are 3.5mm....
No, it is not a phono jack!
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Dave McGuire
Michael A. Terrell
jean-Jacques F6HTG