Date   
Re: Off topic - Electronics Book Club from the 70s and 80s

aldue
 

Electronics book club
P.O. Box 182600
Columbus, OH 43272-3027 .......ask about 5 books for 4.97
electronic engineers book club
P.O. Box 182601
Columbus, OH 43272-3028

paperbacks from
Electronic Technology Today
P.O. Box240
Massapequa Park, NY
11762-0240



On Sat, Mar 28, 2020 at 11:20 PM aldue via Groups.Io <garydirkse=
gmail.com@groups.io> wrote:

Hi Richard, I shall dig around in the morning. 73 aldue

On Sat, Mar 28, 2020, 2:20 PM Richard in Edenton NC via Groups.Io <w4mcd=
yahoo.com@groups.io> wrote:

Hi, I have been a ham radio operator since 1976 when I was a teenager. I
do have a Tektronix scope and a 492 spectrum analyzer and a bunch of
other
electronic test equipment but it has been years since I was a component
level bench tech. I am hoping some on here might have a catalog from the
former Electronics Book Club that advertised in electronics magazines
back
in the 70s and 80s. My goal is to find names of older pubs and order them
and give me something to do that I used to enjoy. I have a few of Harold
Kinleys books, some by John Link and some decent oscilloscope books. I am
wanting to get back to basics on theory and troubleshooting. Thanks
everyone.

73 Richard W4MCD





Re: New 2465 Seimens brushless motor

victor.silva
 

Paul,

I've tried that, sorry does not work at all.

--Victor

Re: WTB: P6139A with all the bits in UK

Colin Herbert
 

I am confused, even if "Subject says it all". Maybe I'm just suffering from
"cabin fever" with all this staying at home business. Are these 3 P3010 (10x
100MHz) probes as in the text, or however many P6139A (x10 500Mhz) probes?
Incidentally, the P6139A probes have a problem with the cable growing
dendrites and shorting the signal.
Colin.

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of David C.
Partridge
Sent: 29 March 2020 17:02
To: TekScopes
Subject: [TekScopes] WTB: P6139A with all the bits in UK

Subject says all

If anyone is interested I have 3 P3010 probes (10x 100MHz) probes looking
for a new home.

David

Re: TDS 420 Oscilloscope

Mlynch001
 

Fortunately, the 460A was built well after the time of the capacitor plague. I pulled all the caps from the SMPS on two units as well as inspected the SM caps on all the boards. All the PSU caps were not leaking and low ESR. The SM caps on the boards look great, no sign of leaking. Both of my scopes were built in the later1990’s. These scopes might not be cutting edge by today’s standards, and have limitations, but they are very capable scopes none the less. You need to weigh your needs and determine if these limitations are going to hinder you in your intended use. I bought both of mine 460A scopes for much less than the price of a single nice 465B that we see being sold today. IMO, They are a good value IF one does not pay too much for a nice example and if you can work within the limiting factors that have already been discussed. I would never buy one that is not working, at least for a novice like myself, the component level repairs are way over my head. Fixing a SMPS is one thing, fixing a main board is an entirely different story.
--
Michael Lynch
Dardanelle, AR

Re: TDS 420 Oscilloscope

Siggi
 

On Sun, Mar 29, 2020 at 10:51 AM David DiGiacomo <daviddigiacomo@...>
wrote:

If you must have a vintage DSO, I think an HP 54622A would be a good
choice.
On my bench I, in order of preference, I have a Tek 2467, a HP54622D and a
TDS784D. The 2467 is a joy to use, but when need to look at slow or
one-time signals, I go to the HP. Only if I run out of bandwidth do I ever
turn on the TDS scope.
So I'd second the suggestion of going for a HP54622X or similar in
preference to the TDS420.
The HP54600-series scopes drive pretty much like analog scopes, but have
long record capture, a good triggering suite and the -D versions come with
16 digital channels. In addition to the -22 and -24, which are 100MHz
bandwith, there exist 60, 350 and 500MHz variations (
https://literature.cdn.keysight.com/litweb/pdf/5968-8152EN.pdf).

Re: TDS 420 Oscilloscope

Oz-in-DFW
 

Everything David says is correct.

That said, I have one on the bench and it's a fine general purpose scope, but I would not seek one out. It's not Tek's finest work, but it is a good platform for learning the limitations of digital scopes. If you get one cheap (as in $35-40) and it passes self test, I'd get it. I'd generally recommend something more recent and capable.

These do suffer from the 'cap plague' and so you will want to do a preemptive inspection and recapping. If it fails, it's likely beyond reasonable recovery as the failure mechanism is caps leaking electrolyte and corroding the PCB beyond reasonable repair.

Re: TDS 420 Oscilloscope

Siggi
 

On Sun, Mar 29, 2020 at 12:08 PM Brendan via Groups.Io
<the_infinite_penguin=yahoo.com@groups.io> wrote:

On Sat, Mar 28, 2020 at 12:25 PM, Bill wrote:

How reliable is the TDS 420 oscilloscope? Saw a video about it and
thought it
would be a nice upgrade from my 453. Looks to be easily service but
have no
knowledge about the reliability or availibility of the ICs if needed at
some
time.
Thanks,
Bill
I have a TDS420. Every single SMD cap was leaking along with a good deal
of power supply capacitors. After replacing all of those it works fine. I
would make sure to check for PCB damage from the leaking caps before I
picked one up. I got lucky and there was very little damage but from what I
have seen the damage can be pretty extensive.

Matt D'Asaro did a write-up on fixing a few of those @MIT:
https://www.antiqueradios.com/forums/viewtopic.php?f=8&t=243742. Sounds
like the capacitor plaque alright...

I hadn't realized these only go to 100MS/sec, and ET after that. The record
length is also fairly limited, at 60k/samples max with option 1M.

Re: Off topic - Electronics Book Club from the 70s and 80s

Tom Phillips
 

Hello Richard,

I have found many good publications listed at http://www.pmillett.com/technical_books_online.htm
The site lists scans of old publications in PDF format. However, even if you do not wish to read from the scans, the list will provide the publication title and author information that you can use to search for a hard copy.

I understand your preference for hard copies. I feel the same way.

Cheers,
Tom

Re: need a tunnel diode

Jan Weber
 

I've got a 465 parts unit still containing the tunnel diodes. But I'm
located in Germany therefore I'm not sure if it's worth the shipping
expense?

Regards

Jan

<http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail>
Virenfrei.
www.avg.com
<http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail>
<#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>

On Sat, Mar 28, 2020 at 10:39 PM Miguel Work <harrimansat@...>
wrote:

Some samples that I bought in Ebay


https://groups.io/g/TekScopes/files/EBAY%20RUSSIAN%20TUNNEL%20DIODES%20576%20TEST.pdf



Re: TDS 420 Oscilloscope

Brendan
 

On Sat, Mar 28, 2020 at 12:25 PM, Bill wrote:


How reliable is the TDS 420 oscilloscope? Saw a video about it and thought it
would be a nice upgrade from my 453. Looks to be easily service but have no
knowledge about the reliability or availibility of the ICs if needed at some
time.
Thanks,
Bill
I have a TDS420. Every single SMD cap was leaking along with a good deal of power supply capacitors. After replacing all of those it works fine. I would make sure to check for PCB damage from the leaking caps before I picked one up. I got lucky and there was very little damage but from what I have seen the damage can be pretty extensive.

WTB: P6139A with all the bits in UK

 

Subject says all

If anyone is interested I have 3 P3010 probes (10x 100MHz) probes looking
for a new home.

David

Re: Off topic - Electronics Book Club from the 70s and 80s

Matthew Hofmann
 

I found myself looking at books from Alfred Morgan (The Boy's Second Book of Radio and Electronics for example) that I nearly wore out the public library's copy back 50+ years ago. This has brought back many memories!
Thanks!

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Jelcke de Boer
Sent: Sunday, March 29, 2020 9:24 AM
To: TekScopes@groups.io
Subject: Re: [TekScopes] Off topic - Electronics Book Club from the 70s and 80s

This site has a wealth of online and free publications on electronics and Ham stuff:
https://www.americanradiohistory.com/

Enjoy!

Best regards,
Jelcke de Boer

Re: TDS 420 Oscilloscope

David DiGiacomo
 

On Sat, Mar 28, 2020 at 1:26 PM Bill via Groups.Io
<ko4nrbs=yahoo.com@groups.io> wrote:
How reliable is the TDS 420 oscilloscope? Saw a video about it and thought it would be a nice upgrade from my 453. Looks to be easily service but have no knowledge about the reliability or availibility of the ICs if needed at some time.
As digital scopes go, I don't think the TDS400 series is a good choice
at this time, for the following reasons:

1. low sample rate of 100MSPS
2. very limited memory of 15Kpt
3. no intensity grading or color
4. awkward user interface

In the reliability department, didn't they suffer from SMD capacitor plague?

If you must have a vintage DSO, I think an HP 54622A would be a good
choice. Otherwise I would be looking at a new scope such as an Instek
GDS-1054B.

Re: Off topic - Electronics Book Club from the 70s and 80s

Tim Phillips
 

from Tim P (UK)
I don't mean to start a 'me too', just to say what a great find !!
Been browsing the electronics magazines we had in the UK - Electronics
Today, ETI, Elector & c.
That inspiration took me, over the years, from a lethal DIY 'scope
'modified' from an AI radar set to the Tek 7000 series.
Also been reading the BBC stuff, and Radio Caroline, the pirate radio
station in the North Sea.
As someone once said: "You've made an old man very happy"
Tim

On Sun, 29 Mar 2020 at 14:23, Jelcke de Boer <jelcke@...> wrote:

This site has a wealth of online and free publications on electronics and
Ham stuff:
https://www.americanradiohistory.com/

Enjoy!

Best regards,
Jelcke de Boer



Re: Off topic - Electronics Book Club from the 70s and 80s

Richard in Edenton NC
 

Jelcke, thank you for sharing this site. A wealth of information

73 Richard W4MCD

Re: Off topic - Electronics Book Club from the 70s and 80s

Mike Jaeger
 

thank you for this post it will be a big help

-----Original Message-----
From: Jelcke de Boer <jelcke@...>
To: TekScopes@groups.io
Sent: Sun, Mar 29, 2020 8:23 am
Subject: Re: [TekScopes] Off topic - Electronics Book Club from the 70s and 80s

This site has a wealth of online and free publications on electronics and Ham stuff:
https://www.americanradiohistory.com/

Enjoy!

Best regards,
Jelcke de Boer

Re: Off topic - Electronics Book Club from the 70s and 80s

Jelcke de Boer
 

This site has a wealth of online and free publications on electronics and Ham stuff:
https://www.americanradiohistory.com/

Enjoy!

Best regards,
Jelcke de Boer

Re: Any Tektronix magnetic shield for a CRT? A strange problem...

Jean-Paul
 

Ernesto: There are at least two types of "mu-metal", with different characteristics.

The Perfection Mica brand has "netic" and "co-netic" for high flux and low flux applications.

The thin foils are designed to be bendable and cutable without affecting the anealing or peorperties too much.

A 1 ' sq sheet was about $15-25 some years ago.

http://www.magnetic-shield.com/index.html

http://custommagneticshielding.magneticshield.com/viewitems/co-netic-sheet-and-foil/co-netic-aa-foil



Bon Journee,



Jean-Paul

Re: vintageTEK scanned transformer drawings for 120-0998-01 and up

 

Hi Dave :
Thanks for work on them , they are very useful information for us !

Rd
Tony

從我的iPhone傳送

Dave Brown <davebr@...>於2020年3月29日 04:26寫道:

I have added a 3rd document on TekWiki with drawings for 120-1007-00 to 120-1349-00. That takes it up to 1984 where SMPS were common. After this all the specifications went to a 12+ page format which is too much time to make scanning worthwhile. Enjoy.

Dave


Re: vintageTEK scanned transformer drawings for 120-0998-01 and up

tek_547
 

Thanx Dave, important piece of information for anyone who´s interested in.
René