Date   

Re: Multi-section electrolytic capacitors from Hayseed

Richard Knoppow
 

I think you will find that multiple capacitors are actually separate caps in the same can. Since the elements were made at the same time and have the same history its very likely that if one fails the others will fail soon. Better to replace the whole thing.
   I don't know if tom sells components but you can ask him.

On 11/21/2020 9:50 AM, Dave Daniel wrote:
Contact Hayseed Hamfest and ask them from where they buy their cans, I have found them to be very supportive of off-the-wall questions,


DaveD


On 11/21/2020 12:40 PM, greenboxmaven via groups.io wrote:
I would like to find a source for empty condenser cans and bases so you could buy them and assemple your own condensers. The versitility to make what you need and repalce only the failed sections would be very welcome. I  have never especially liked the idea of one big condenser winding being devided into portions. I have had too many problems of leakage or signals crossing from one section to another ( like the AGC portion in a Hammarlund HQ-180), plus the need to change the entire thing when one section fails. I can understand the convenience to a manufacturer, but the problems to the equipment owner are not welcome.  Meanwhile, I will cut the cans in two, emply them, put in new condensers and put a shrink tube cover over them to hold everything together. To answer you question, I have a couple big hifi amplifiers that use multi section condensers. The replacements are NOT Hayseed brand, but another well known maker, and all of them have failed at less than five years of age.  What have other people experienced with contemporary can condenser makers?

        Bruce Gentry, KA2IVY


On 11/21/20 9:21 AM, Dave Daniel wrote:
I've purchased from Hayseed Hamfest multiple times. My purchases have been for Heathkit gear.

I don't know if there are many Tektronix instruments that use multi-section caps. But for Heathkit replacements, Hayseed Hamfest has been invaluable.

DaveD


On 11/21/2020 5:01 AM, John Shadbolt wrote:
Hi,

Are there many Tek units that use multi-section electrolytic capacitors? I came across this company that have a range of new caps available and can make custom orders, I've not used them but would welcome any feedback:

https://hayseedhamfest.com/

Regards,
John








--
Richard Knoppow
dickburk@ix.netcom.com
WB6KBL


Re: Multi-section electrolytic capacitors from Hayseed

Dave Daniel
 

Contact Hayseed Hamfest and ask them from where they buy their cans, I have found them to be very supportive of off-the-wall questions,


DaveD

On 11/21/2020 12:40 PM, greenboxmaven via groups.io wrote:
I would like to find a source for empty condenser cans and bases so you could buy them and assemple your own condensers. The versitility to make what you need and repalce only the failed sections would be very welcome. I  have never especially liked the idea of one big condenser winding being devided into portions. I have had too many problems of leakage or signals crossing from one section to another ( like the AGC portion in a Hammarlund HQ-180), plus the need to change the entire thing when one section fails. I can understand the convenience to a manufacturer, but the problems to the equipment owner are not welcome.  Meanwhile, I will cut the cans in two, emply them, put in new condensers and put a shrink tube cover over them to hold everything together. To answer you question, I have a couple big hifi amplifiers that use multi section condensers. The replacements are NOT Hayseed brand, but another well known maker, and all of them have failed at less than five years of age.  What have other people experienced with contemporary can condenser makers?

        Bruce Gentry, KA2IVY


On 11/21/20 9:21 AM, Dave Daniel wrote:
I've purchased from Hayseed Hamfest multiple times. My purchases have been for Heathkit gear.

I don't know if there are many Tektronix instruments that use multi-section caps. But for Heathkit replacements, Hayseed Hamfest has been invaluable.

DaveD


On 11/21/2020 5:01 AM, John Shadbolt wrote:
Hi,

Are there many Tek units that use multi-section electrolytic capacitors? I came across this company that have a range of new caps available and can make custom orders, I've not used them but would welcome any feedback:

https://hayseedhamfest.com/

Regards,
John







--
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus


Re: Multi-section electrolytic capacitors from Hayseed

greenboxmaven
 

I would like to find a source for empty condenser cans and bases so you could buy them and assemple your own condensers. The versitility to make what you need and repalce only the failed sections would be very welcome. I have never especially liked the idea of one big condenser winding being devided into portions. I have had too many problems of leakage or signals crossing from one section to another ( like the AGC portion in a Hammarlund HQ-180), plus the need to change the entire thing when one section fails. I can understand the convenience to a manufacturer, but the problems to the equipment owner are not welcome. Meanwhile, I will cut the cans in two, emply them, put in new condensers and put a shrink tube cover over them to hold everything together. To answer you question, I have a couple big hifi amplifiers that use multi section condensers. The replacements are NOT Hayseed brand, but another well known maker, and all of them have failed at less than five years of age. What have other people experienced with contemporary can condenser makers?

Bruce Gentry, KA2IVY

On 11/21/20 9:21 AM, Dave Daniel wrote:
I've purchased from Hayseed Hamfest multiple times. My purchases have been for Heathkit gear.

I don't know if there are many Tektronix instruments that use multi-section caps. But for Heathkit replacements, Hayseed Hamfest has been invaluable.

DaveD


On 11/21/2020 5:01 AM, John Shadbolt wrote:
Hi,

Are there many Tek units that use multi-section electrolytic capacitors? I came across this company that have a range of new caps available and can make custom orders, I've not used them but would welcome any feedback:

https://hayseedhamfest.com/

Regards,
John





Re: FS: Tek scope, HP LA, and Electronic components!

Richard R. Pope
 

Hello all,
I forgot to put in that I live in Reedsburg, WI 53959 which is near the WI Dells. Sorry about that!
GOD Bless and Thanks,
rich!

On 11/21/2020 4:29 AM, Richard R. Pope wrote:
Hello all,
I have probably developed cancer. I can't get in for treatment. I have enough lumps in my body that it probably wouldn't make a difference. So more than likely I am dying. I am asking for everyone's help. I am selling off all of my processions and simplifying my life before I die. I don't want to see this stuff end up in the landfill. Please help out a dying old man?
I have a Tektronix 465B Scope with four probes for sale. A HP 16700A LA with 5 16555D LA cards and all of the cables. There is a 16701B Expansion box and the interconnect cable. There is an external SCSI drive box with a CD rom and a ST318417N drive in it. There are a bunch of micro probes for the LA. A monitor, keyboard, mouse, manuals, and CDs. I also have a very large collection of electronic components in over 40 storage cabinets. There are also a lot of books on electronics.
I am asking $250 plus the shipping on the scope. This shipping won't be cheap. $500 plus shipping for the LA. Again shipping will be very expensive. It will take five boxes to ship the LA. I will deliver the scope and/or LA to any where in the lower 48 for the cost of shipping. $500 for the components, cabinets, and books. Shipping is not possible. So it it have to be local pick up. Bring a truck and trailer.
PP F&F, Cashiers Check, or Postal Money Order. Please contact me off list.
GOD Bless and Thanks,
rich!
Happy Thanksgiving!





Open Filament on scope

Marvin Moss
 

*Many thanks for all the replies from members.
*
*I checked the pins to make sure that they were soldered and even re-soldered them carefully.*
*I know it all depends on what kind of open there is and where it might be located.*
*I will have to let all know if I am successful or not.*
*My fondest thanks to all responders.  You folks are the best!!  A great group of helpers!!
*


Re: Multi-section electrolytic capacitors from Hayseed

Dave Daniel
 

I've purchased from Hayseed Hamfest multiple times. My purchases have been for Heathkit gear.

I don't know if there are many Tektronix instruments that use multi-section caps. But for Heathkit replacements, Hayseed Hamfest has been invaluable.

DaveD

On 11/21/2020 5:01 AM, John Shadbolt wrote:
Hi,

Are there many Tek units that use multi-section electrolytic capacitors? I came across this company that have a range of new caps available and can make custom orders, I've not used them but would welcome any feedback:

https://hayseedhamfest.com/

Regards,
John



--
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus


FS: Tek scope, HP LA, and Electronic components!

Richard R. Pope
 

Hello all,
I have probably developed cancer. I can't get in for treatment. I have enough lumps in my body that it probably wouldn't make a difference. So more than likely I am dying. I am asking for everyone's help. I am selling off all of my processions and simplifying my life before I die. I don't want to see this stuff end up in the landfill. Please help out a dying old man?
I have a Tektronix 465B Scope with four probes for sale. A HP 16700A LA with 5 16555D LA cards and all of the cables. There is a 16701B Expansion box and the interconnect cable. There is an external SCSI drive box with a CD rom and a ST318417N drive in it. There are a bunch of micro probes for the LA. A monitor, keyboard, mouse, manuals, and CDs. I also have a very large collection of electronic components in over 40 storage cabinets. There are also a lot of books on electronics.
I am asking $250 plus the shipping on the scope. This shipping won't be cheap. $500 plus shipping for the LA. Again shipping will be very expensive. It will take five boxes to ship the LA. I will deliver the scope and/or LA to any where in the lower 48 for the cost of shipping. $500 for the components, cabinets, and books. Shipping is not possible. So it it have to be local pick up. Bring a truck and trailer.
PP F&F, Cashiers Check, or Postal Money Order. Please contact me off list.
GOD Bless and Thanks,
rich!
Happy Thanksgiving!


Multi-section electrolytic capacitors from Hayseed

 

Hi,

Are there many Tek units that use multi-section electrolytic capacitors? I came across this company that have a range of new caps available and can make custom orders, I've not used them but would welcome any feedback:

https://hayseedhamfest.com/

Regards,
John


Re: 465M Wave Forms

Harrison
 

Thank you for the clarification Dave. The markings on the different BNCs on the back of the 465M is very clear and descriptive (matching the labeling used in the Wave Form section of the manual). I must ask just to be completely clear; When you refer to the "A EXT Trigger" of the 460A, in your answer, are you referring to the single BNC on the back of the 460A labeled "Aux Trigger/Ext Clock +6V. I ask because scope use is not a norm for me and I don't want to damage either scope by a wrong hook up. Also, do or should I have an attenuator or such in the cable hook up to protect either scope?
Finally, what is the intent of the 50 Ohm cable between the 465M and the 460A (Between the scope under test and the test scope.)? If you have the probe on channel 1 of the test scope and are probing the scope under test, what is the 50 Ohm cable doing for you? I don't question the instruction I just am trying to understand why the set up is this way. Harrison N1FAM


Looking for manual for Tektronix 1107 DC power supply for 2000 series

John Williams
 

Hi everyone. I hope you are all doing well. I recently purchased a Tektronix 1107 dc supply for 2200, 2400 and 2300 scopes. It’s kind of neat, mounts directly on the back of the scope. I tested it today and it looks like it is working. However I would like to have some sort of manual. If anyone has one or knows where I can get one please I would appreciate knowing. Thanks and stay safe please.


Re: Broken Tektronix scopes free

barry.ballenger@...
 

i would be interested in the 2236. what seems to be the problem(s) with
it? Let me know what you need to send it my way.

On Thu, Nov 19, 2020 at 6:28 PM Walter Hunter <jonde720d@gmail.com> wrote:

Hi:
I m interested in the 465.
Wallaby

On Thu, Nov 19, 2020 at 9:47 AM Michael W. Lynch via groups.io <mlynch003=
yahoo.com@groups.io> wrote:

I would like to hear more about the 465's

--
Michael Lynch
Dardanelle, AR










Re: Open filament on CRT

SCMenasian
 

Typing mishap: The last sentence should start "It survived" not "I survived"


Re: Open filament on CRT

SCMenasian
 

This reminds me of a similar situation I encountered when I was a graduate student. My thesis advisor was collaborating with an industrial lab in another state; he got me a Summer job there. I was to get an apparatus they had built operational and, then bring it back to the university for my actual dissertation work. This was no insignificant apparatus. It was a masterpiece of glass blowing, etc - much more complex and larger than a typical CRT.

Unfortunately, when I tried to fire it up, the filament circuit was found to be open. It hadn't survived bakeout. The filament-to-support connections had been hard soldered. One of them opened up during the bakeout. Opening it up for repair would have consumed the entire Summer, a prospect which I didn't relish. I surmised that the bakeout had produced some corrosion or a break in one of the hard solder joints. My proposed solution was to use a Tesla coil (one of those 50 kV hand held units used in Physics labs for finding vacuum leaks, starting arcs, etc.) to zap the filament circuit (grounding one end and hitting the other with a spark). Amazingly, it worked. Whatever was impeding current flow was blown away and/or a functioning connection was made. The apparatus became useful. I survived the trip back to the university and I used it there for over a year and served its intended purpose without further filament mishaps.


Re: Looking into Tekscopes

 

This was a SPAMMER. I didn't catch him before he was able to post this message. He has been removed from our membership and this message has been removed from our archives.
Ignore this.
Dennis Tillman W7pF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Colin Herbert via groups.io
Sent: Friday, November 20, 2020 1:09 AM
To: TekScopes@groups.io
Subject: Re: [TekScopes] Looking into Tekscopes

What do you mean by "getting Tekscopes"? If you are hoping to become a member of the Forum, you need to write a sort-of resume/justification and send it to the Moderator. If you mean buying Tektronix oscilloscopes, search eBay.
Colin.

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of michal.gordon via groups.io
Sent: 18 November 2020 19:22
To: TekScopes@groups.io
Subject: [TekScopes] Looking into Tekscopes

Hi everyone.
I'm looking into getting Tekscopes. Any thoughts or tips on how to go about it?

Thanks,
Michal













--
Dennis Tillman W7pF
TekScopes Moderator


Re: Open filament on CRT

Jean-Paul
 

Hello: Stored energy of a capacitor charged to 100s of volts can be lethal, use precautions

Jon


Re: LAST CALL for Peter Keller's Book and Current Orders I have

Colin Herbert
 

If the other two people in the UK that are interested in this book live
fairly near to London, I might be amenable to having all three sent to my
address and then pass them on. It is just possible, I suppose, that these
folk work in London and could even call at my house. I live in Wimbledon
Park and am close to the All-England Tennis and Croquet Club. I might also
be happy to post them on, packaging and post at cost. Other than that, I am
quite prepared to pay the shipping for the one book that I have asked for.
Colin.

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Dennis
Tillman W7pF
Sent: 19 November 2020 22:25
To: TekScopes@groups.io
Subject: [TekScopes] LAST CALL for Peter Keller's Book and Current Orders I
have

This is a last call for Peter Keller's fabulous book. I will accept orders
until Friday evening my time. At present I have orders for 75 books.
At that time I will publish the final list of people I have received an
order from and I will explain how to make payment.
Below are the people who have been placed on Peter's book order. Please
confirm your name is on this list.

If you have missed all of the excitement here is a summary
Pete Keller (from Tektronix) is prolific writer about cathode ray tubes and
many other kinds of display technologies.
He published a very detailed book on the subject in 1991 which I highly
recommend. The book title is:
"The Cathode Ray Tube, Technology, History, and Applications", Peter A.
Keller. 320 p.
ISBN 0-9631559-0-3;
TK7871.73.K46;
621.3815'42-DC20

I paid $70 for my copy years ago when I bought it from Peter. There is a
copy of his book currently on eBay listed for $650!!!
Peter's book is still available in hard cover and he has copies of it to
sell to us.
Because of recent interest in it from TekScopes members I went out on a limb
and asked Peter if a discount would be available for our members if we
bought enough books to make it worth his while and if I did all the work for
him.
He agreed and offered our members a huge discount. The cost will be $30 +
shipping.
I am hoping I can even get him to autograph each copy.
I promised Peter I would keep his effort to an absolute minimum by
collecting the names and addresses, payments which I would send to him in
one lump sum; then when he ships all the books to me I will mail each book
for him.

The cost for a book going anywhere in the US is $30 + $4 Media Rate Postage
+ $3 for supplies and my time. The total will be $37.00.
The cost for orders overseas will be $30 + approximately $35 for Flat Rate
International Priority Mail (this includes tracking).

If you want a copy of Peter's book send your mailing address to me OFF-LIST
at dennis at ridesoft dot com. INCLUDE YOUR ADDRESS.

These are the orders I have as of 2:15PM (UTC-08:00) Coordinated Universal
Time-08.
If your name is not on this list then I missed your order (my apologies) so
resend it with your address.

UNITED STATES ORDERS
Eric Spendel Fairfield, OH 45014
Dave Daniel Mims, FL 32754
Chuck Azzalina Perkasie, PA 18944
Jean Paul Novato, CA 94947
Kurt Rosenfeld Ossining, NY 10562
Vince Vielhaber K8ZW Oxford, MI 48371
Stan Perkins N6BYU San Diego, CA 92109-2348
Bruce Lane Kent, WA 98030-8803
Mark Huffstutter Seattle, WA 98115
Joe Rigdon Oviedo, FL 32765
Jeffrey S. Dutky Silver Spring, MD 20901
Larry Snyder Springboro, OH 45066-9761
Byron Hayes Jr. WA6ATN Toluca Lake, CA 91602-2914
Michael Drum Fanwood, NJ 07023-1008
Jack Reynolds Howell, MI, 48843
Phil Erickson Clinton, MA 01510
Edward Oscarson New Hartford, CT 06057
Steve Berg Casselberry, FL 32707
Charles Daves Aurora, CO 80015-1422
Chuck Harris Damascus, MD 20872
John Malec IV Northglenn, CO 80234
Marvin Moss Marietta, GA 30064
Tom Norman Escalon, CA 95320
Bill Lavick WA2SMF Edwards, NY 13635
Jeff Frantzen Olathe, KS 66062-3693
Glenn Little Goose Creek, SC 29445
Mark Vincent N. Chesterfield, VA 23236
Lance Lieberman Albertson, NY 11507-1022
Steven Horii Bryn Mawr, PA 19010-1226
Charles Nalley Burien, WA 98166
Carl Miles Rio Rancho, NM 87124
Larry Schneider Otis, ME 04605-7652
Dennis McCreery Bellevue, WA 98008
Tim Laing Lima, OH 45801-4644
Chris Wilkson Detroit, MI 48206
Timothy Koeth Brandywine, MD 20613
John Griessen Albuquerque, NM 87107
Greg Muir Great Falls, MT 59405-3144
Kurt Swanson Wilton, CA 95693-9765
Bruce Gentry KA2IVY Mattydale, NY 13211
Peter Brown Broomfield, CO 80023
Tim Pierce Cottage Grove, OR 97424
Bob Darlington N3XKB Los Alamos, NM 87544
Hugh Vartanian Littleton, MA 01460
Richard Brittingham W4MCD Edenton, NC 27932
Jim Rawlings AF6VF Livermore, CA 94550
Monte Meredith Reno, NV 89511
Chris Loggans Haymarket, VA 20169
Steve Bates Concord, MA 01742
John Glass, O'Brien Electric Dallas, OR 97338

INTERNATIONAL ORDERS
Sigurdur Asgeirsson CANADA
Shaun Merrigan CANADA
Bill Perkins, PEARL, Inc. CANADA
Dan Gajanovic CANADA
Andy Guelzow VA7NNM CANADA
Simon Jarman FRANCE
Christoph F. Bruggaier GERMANY
Heinz Breuer GERMANY
Jan Wuesten GERMANY
Red Dot Finder THE NETHERLANDS
Leo Potjewijd THE NETHERLANDS
Mario Giganti I1CWZ ITALY
Colin Herbert UNITED KINGDOM
Alan Ainslie UNITED KINGDOM
Robert Angell UNITED KINGDOM
Thomas S. Knutsen NORWAY
Jared Cabot JAPAN
Gangyi, Le SINGAPORE


Re: Looking into Tekscopes

Colin Herbert
 

What do you mean by "getting Tekscopes"? If you are hoping to become a member of the Forum, you need to write a sort-of resume/justification and send it to the Moderator. If you mean buying Tektronix oscilloscopes, search eBay.
Colin.

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of michal.gordon via groups.io
Sent: 18 November 2020 19:22
To: TekScopes@groups.io
Subject: [TekScopes] Looking into Tekscopes

Hi everyone.
I'm looking into getting Tekscopes. Any thoughts or tips on how to go about it?

Thanks,
Michal


Re: Open filament on CRT

Ed Breya
 

Also, Marvin, if this is not rhetorical, and you are contemplating an actual, specific CRT attempt, you should mention what it is, and the situation, then let it stew for a while. You may get some feedback from others that have direct experience with, and knowledge of, particular CRTs. There is a certain amount of finesse that can be applied to improve chances of success, depending on the details.

Ed


Re: Open filament on CRT

Frank DuVal
 

And, if the CRT has pins that are over the wires coming out of the glass, resolder the pins. I've fixed several smaller tubes that way over the years.

Frank

On 11/19/2020 11:40 PM, Ed Breya via groups.io wrote:
I agree - nothing to lose. BUT, be sure that's the problem first. If you're assuming the heater is open because the CRT doesn't light up, or measuring the heater through the wiring and socket, you don't really know for sure. Before such a drastic action, measure the heater right at the CRT base pins to be sure. Then there's nothing to lose.

Ed


Re: Open filament on CRT

Ed Breya
 

I agree - nothing to lose. BUT, be sure that's the problem first. If you're assuming the heater is open because the CRT doesn't light up, or measuring the heater through the wiring and socket, you don't really know for sure. Before such a drastic action, measure the heater right at the CRT base pins to be sure. Then there's nothing to lose.

Ed

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