Choice of iron powder toriod?
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Choice of iron powder toriod?
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William E. Sabin
Guest
Posted: Tue Oct 18, 2005 4:35 pm    Post subject: Re: Choice of iron powder toriod? Reply with quote
Hello, Mike,

I had a little experience with some military L-band RF design (JTIDS), but
that is about all. I have also designed miniature lumped-element filters
for the 3 GHz region. But most of my work and also my ham radio experience
have been at HF. Also, I am mostly, but not entirely, an analog specialist,
which has put me somewhat into the Jurassic Age.

Bill W0IYH

"Michael A. Terrell" <mike.terrell@earthlink.net> wrote in message
news:4354FDA4.196B67C2@earthlink.net...
Quote:
"William E. Sabin" wrote:

Yes. I started at Collins Radio engineering department in 1964 and
retired
from Rockwell Collins in 1990. For more info search Google for my name
and
my call sign. See QRZ.COM for W0IYH. See www.noblepub.com.

Bill W0IYH


Did you ever work on their microwave receiver designs?

--
?

Michael A. Terrell
Central Florida


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Joerg
Guest
Posted: Tue Oct 18, 2005 9:45 pm    Post subject: Re: Choice of iron powder toriod? Reply with quote
Hello Bill,

Quote:
... Also, I am mostly, but not entirely, an analog specialist,
which has put me somewhat into the Jurassic Age.


Not really. Newly minted engineers know remarkably little about analog
techniques. Yet at the beginning and the end of circuits stuff usually
needs to connect to the analog world. So don't be surprised when someone
begs you to do just one more stint when you are past 90.

Then again a SW engineer once told me that nothing is truly analog.
There is always that smallest digital step, the quantum.

Regards, Joerg

http://www.analogconsultants.com
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Michael A. Terrell
Guest
Posted: Wed Oct 19, 2005 12:35 am    Post subject: Re: Choice of iron powder toriod? Reply with quote
"William E. Sabin" wrote:
Quote:

Hello, Mike,

I had a little experience with some military L-band RF design (JTIDS), but
that is about all. I have also designed miniature lumped-element filters
for the 3 GHz region. But most of my work and also my ham radio experience
have been at HF. Also, I am mostly, but not entirely, an analog specialist,
which has put me somewhat into the Jurassic Age.

Bill W0IYH


There is no reason to apologize for being good with analog. ;-) I
worked as a broadcast engineer during the time they announced the first
memory chip, (1101) which was a slow, noisy 256 bit * 1 DRAM with very
critical timing. I also did analog and digital work on the microwave
equipment built at Microdyne, before L3-Com closed the Ocala plant.

The reason I asked about the microwave equipment, I would like to
meet the people who designed the C-band CATV receivers I had to maintain
in the '80s. I always loved Collins equipment, till I ran into those
radios. They had a horrible failure rate, and took over six months to
have serviced by Collins. I think I still have a set of manuals for
the fixed tuned, and the agile models. I started repairing them for
United Video in 1982, and could return most of them to service the same
day.


--
?

Michael A. Terrell
Central Florida

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Joerg
Guest
Posted: Wed Oct 19, 2005 12:35 am    Post subject: Re: Choice of iron powder toriod? Reply with quote
Hello Michael,

Quote:
There is no reason to apologize for being good with analog. ;-) I
worked as a broadcast engineer during the time they announced the first
memory chip, (1101) which was a slow, noisy 256 bit * 1 DRAM with very
critical timing. I also did analog and digital work on the microwave
equipment built at Microdyne, before L3-Com closed the Ocala plant.


Seems you started with digital stuff a year or two earlier than I did.
My first RAM had a whopping 1024 bits. Not bytes, bits. 21...something,
I could look it up since the device where its in still works.


Quote:
The reason I asked about the microwave equipment, I would like to
meet the people who designed the C-band CATV receivers I had to maintain
in the '80s. I always loved Collins equipment, till I ran into those
radios. They had a horrible failure rate, ...


But their HF radios were quite reliable. Unfortunately at that time out
of my budget range, and so were those nice mechanical filters :-(

Regards, Joerg

http://www.analogconsultants.com
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Michael A. Terrell
Guest
Posted: Wed Oct 19, 2005 6:56 am    Post subject: Re: Choice of iron powder toriod? Reply with quote
Joerg wrote:
Quote:

Hello Michael,

There is no reason to apologize for being good with analog. ;-) I
worked as a broadcast engineer during the time they announced the first
memory chip, (1101) which was a slow, noisy 256 bit * 1 DRAM with very
critical timing. I also did analog and digital work on the microwave
equipment built at Microdyne, before L3-Com closed the Ocala plant.


Seems you started with digital stuff a year or two earlier than I did.
My first RAM had a whopping 1024 bits. Not bytes, bits. 21...something,
I could look it up since the device where its in still works.

2114? 1K * 4 bits?

Quote:
The reason I asked about the microwave equipment, I would like to
meet the people who designed the C-band CATV receivers I had to maintain
in the '80s. I always loved Collins equipment, till I ran into those
radios. They had a horrible failure rate, ...

But their HF radios were quite reliable. Unfortunately at that time out
of my budget range, and so were those nice mechanical filters :-(

Regards, Joerg

http://www.analogconsultants.com

I still have an unused 2.1 KHz Collins 455 KHz mechanical filter I
bought at the Dayton hamfest years ago. Its a little narrow for voice,
but it would be good for CW.

I still like Collins equipment, just not their poorly designed CATV
equipment. I wish I could afford a R-390 and felt well enough to do a
complete restoration. :(

--
?

Michael A. Terrell
Central Florida
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Tim Williams
Guest
Posted: Wed Oct 19, 2005 7:47 am    Post subject: Re: Choice of iron powder toriod? Reply with quote
"Joerg" <notthisjoergsch@removethispacbell.net> wrote in message
news:3F95f.2019$dO2.694@newssvr29.news.prodigy.net...
Quote:
Then again a SW engineer once told me that nothing is truly analog.
There is always that smallest digital step, the quantum.

So, digital is base two, and analog is base 1.6 x 10^19? ;-)

Tim

--
Deep Fryer: a very philosophical monk.
Website: http://webpages.charter.net/dawill/tmoranwms
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Keith Williams
Guest
Posted: Wed Oct 19, 2005 4:35 pm    Post subject: Re: Choice of iron powder toriod? Reply with quote
In article <Eti5f.8621$lN2.115@fe04.lga>, tmoranwms@charter.net
says...
Quote:
"Joerg" <notthisjoergsch@removethispacbell.net> wrote in message
news:3F95f.2019$dO2.694@newssvr29.news.prodigy.net...
Then again a SW engineer once told me that nothing is truly analog.
There is always that smallest digital step, the quantum.

So, digital is base two, and analog is base 1.6 x 10^19? ;-)

Not really. Analog's bits are just smaller. ;-)

--
Keith
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Graham W
Guest
Posted: Wed Oct 19, 2005 8:36 pm    Post subject: Re: Choice of iron powder toriod? Reply with quote
Michael A. Terrell wrote:
Quote:
Joerg wrote:

Hello Michael,

There is no reason to apologize for being good with analog. ;-) I
worked as a broadcast engineer during the time they announced the
first memory chip, (1101) which was a slow, noisy 256 bit * 1 DRAM
with very critical timing. I also did analog and digital work on
the microwave equipment built at Microdyne, before L3-Com closed
the Ocala plant.


Seems you started with digital stuff a year or two earlier than I
did. My first RAM had a whopping 1024 bits. Not bytes, bits.
21...something, I could look it up since the device where its in
still works.

2114? 1K * 4 bits?

Nah - 2102 1k * 1.

Had 8 of 'em in in my homebuilt Nascom 1 computer which with a
2708 UVEPROM for the 'monitor' was all the RAM for system and
user code and video store! Nevertheless, it was sufficient for a
machine code program to run 'Lunar Lander', hee hee.

Collins filters were regarded as the bees knees in UK ham circles
but I never could afford one!

73 de G3VPC

--
Graham W http://www.gcw.org.uk/ PGM-FI page updated, Graphics Tutorial
WIMBORNE http://www.wessex-astro-society.freeserve.co.uk/ Wessex
Dorset UK Astro Society's Web pages, Info, Meeting Dates, Sites & Maps
Change 'news' to 'sewn' in my Reply address to avoid my spam filter.
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Joerg
Guest
Posted: Wed Oct 19, 2005 10:10 pm    Post subject: Re: Choice of iron powder toriod? Reply with quote
Hello Tim,

Quote:
Then again a SW engineer once told me that nothing is truly analog.
There is always that smallest digital step, the quantum.

So, digital is base two, and analog is base 1.6 x 10^19? ;-)


Still, the digital guys kept telling us "Some day we'll get there and
then you are going to be extinct". I am not worried at all...

Regards, Joerg

http://www.analogconsultants.com
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Pooh Bear
Guest
Posted: Wed Oct 19, 2005 10:38 pm    Post subject: Re: Choice of iron powder toriod? Reply with quote
Joerg wrote:

Quote:
Still, the digital guys kept telling us "Some day we'll get there
........

How long have they been saying that ???? ;-)

Graham
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Keith Williams
Guest
Posted: Wed Oct 19, 2005 10:55 pm    Post subject: Re: Choice of iron powder toriod? Reply with quote
In article <43568483.CCBB8C37@hotmail.com>,
rabbitsfriendsandrelations@hotmail.com says...
Quote:


Joerg wrote:

Still, the digital guys kept telling us "Some day we'll get there
........

How long have they been saying that ???? ;-)

We've been getting half the way there every two years or so. ;-)

--
Keith
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Michael A. Terrell
Guest
Posted: Mon Oct 24, 2005 12:04 am    Post subject: Re: Choice of iron powder toriod? Reply with quote
Graham W wrote:
Quote:

Michael A. Terrell wrote:
Joerg wrote:

Hello Michael,

There is no reason to apologize for being good with analog. ;-) I
worked as a broadcast engineer during the time they announced the
first memory chip, (1101) which was a slow, noisy 256 bit * 1 DRAM
with very critical timing. I also did analog and digital work on
the microwave equipment built at Microdyne, before L3-Com closed
the Ocala plant.


Seems you started with digital stuff a year or two earlier than I
did. My first RAM had a whopping 1024 bits. Not bytes, bits.
21...something, I could look it up since the device where its in
still works.

2114? 1K * 4 bits?

Nah - 2102 1k * 1.

That was one early memory chip i don't recall using.


Quote:
Had 8 of 'em in in my homebuilt Nascom 1 computer which with a
2708 UVEPROM for the 'monitor' was all the RAM for system and
user code and video store! Nevertheless, it was sufficient for a
machine code program to run 'Lunar Lander', hee hee.

Collins filters were regarded as the bees knees in UK ham circles
but I never could afford one!


The price was right, that day at the Dayton hamfest. ;-)

Quote:
73 de G3VPC


--
?

Michael A. Terrell
Central Florida
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Steve Nosko
Guest
Posted: Thu Oct 27, 2005 11:35 pm    Post subject: Re: Choice of iron powder toriod? Reply with quote
"Joerg" <notthisjoergsch@removethispacbell.net> wrote in message
news:3F95f.2019$dO2.694@newssvr29.news.prodigy.net...
Quote:
Hello Bill,

...

Then again a SW engineer once told me that nothing is truly analog.
There is always that smallest digital step, the quantum.
Regards, Joerg


Poor fella's got it bass ackward.

73, Steve, K,9;D.C'I
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Steve Nosko
Guest
Posted: Thu Oct 27, 2005 11:38 pm    Post subject: Re: Choice of iron powder toriod? Reply with quote
"Keith Williams" <krw@att.bizzzz> wrote in message
news:MPG.1dc0285a10282227989c49@news.individual.net...
Quote:
In article <Eti5f.8621$lN2.115@fe04.lga>, tmoranwms@charter.net
says...
"Joerg" <notthisjoergsch@removethispacbell.net> wrote in message
news:3F95f.2019$dO2.694@newssvr29.news.prodigy.net...
Then again a SW engineer once told me that nothing is truly analog.
There is always that smallest digital step, the quantum.

So, digital is base two, and analog is base 1.6 x 10^19? ;-)

Not really. Analog's bits are just smaller. ;-)
-- Keith

That's what he said... 10^18 smaller
73, Steve, K,9.D;C'I
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Steve Nosko
Guest
Posted: Thu Oct 27, 2005 11:39 pm    Post subject: Re: Choice of iron powder toriod? Reply with quote
"Keith Williams" <krw@att.bizzzz> wrote in message
news:MPG.1dc0529ba3517d20989c55@news.individual.net...
Quote:
In article <43568483.CCBB8C37@hotmail.com>,
rabbitsfriendsandrelations@hotmail.com says...


Joerg wrote:

Still, the digital guys kept telling us "Some day we'll get there
........

How long have they been saying that ???? ;-)

We've been getting half the way there every two years or so. ;-)

--
Keith



Don-chya love it ? !

73, Steve, K9DCI
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