Date   

Re: WTB: 3B4 plug in for RTTY

Brenda
 

Hello Bruce,

I do have not 1 but 2 Tektronix 3B4 time bases that I would be willing to part with. 1 of them is functional as far as basic use goes. I am not a professional by any means, so I don't fully understand everything about all the features. But last time I used it, it does trigger very well and has a "NOS" 7119 tube for the amplifier according to the flea bay seller which I had to drop $100 for 1 of those tubes. (People are greedy when they see the Amperex logo....) The other one is a parts unit and is in better shape cosmetically that I have been holding onto for the working time base. I think I did throw some tubes in it and tried it out, and the sweep was all wonky, but it did seem to trigger if memory serves me right, been a few years since I have piddled with the time base. I am pretty sure that I have a hard copy of the manual as well.

If you are still interested, I could pull out that time base and check it to the best of my knowledge. Granted, they are not calibrated.

Brenda


Re: Tektronix 317

Bob Albert
 

Well if you like I can take a look.  I'm in the San Fernando Valley.
Bob

On Thursday, December 17, 2020, 02:22:45 PM PST, <brockkoren@gmail.com> wrote:

I turn it on and it gets power, but there is no trace on the CRT. I move both position knobs and AC coupe it but still can't see a trace.  I open it up and there does not appear to be any lose wires or connections. It was pretty clean and I used compressed air to clean it out more. The fan kind of works, it spins really really slow. The tubes all appear to glow but after the 317 is on for 30 minutes it starts to make some noise so I turn it off for fear of cooking something.


Re: Tektronix 317

 

I turn it on and it gets power, but there is no trace on the CRT. I move both position knobs and AC coupe it but still can't see a trace. I open it up and there does not appear to be any lose wires or connections. It was pretty clean and I used compressed air to clean it out more. The fan kind of works, it spins really really slow. The tubes all appear to glow but after the 317 is on for 30 minutes it starts to make some noise so I turn it off for fear of cooking something.


Re: WTB: 3B4 plug in for RTTY

widgethunter
 

Look at 2B67; hor in without tunnel diode triggering and often available for nothing.The 3B4 is much more rare and my personal favorite, but may be overkill for your application.

-----Original Message-----
From: greenboxmaven via groups.io <ka2ivy=verizon.net@groups.io>
To: TekScopes@groups.io
Sent: Thu, Dec 17, 2020 9:46 am
Subject: Re: [TekScopes] WTB: 3B4 plug in for RTTY

I want to be able to display other signals as well as the  common RTTY
X-Y tuning indication without needing to exchange the modules.

      Bruce Gentry, KA2IVY


On 12/17/20 12:38, widgethunter via groups.io wrote:
why not use another vertical plug-in for external hor input?
 
 
 
-----Original Message-----
From: greenboxmaven via groups.io <ka2ivy=verizon.net@groups.io>
To: TekScopes@groups.io
Sent: Wed, Dec 16, 2020 8:37 pm
Subject: [TekScopes] WTB: 3B4 plug in for RTTY

I am going to use the 561B rack mount scope I have restored in an RTTY
setup.  The time base I have does not offer an external horizontal
input. A 3B4 or perhaps 3T4 does have it. Does anyone have one to spare?
Thanks,

Bruce Gentry, KA2IVY












Re: WTB: 3B4 plug in for RTTY

greenboxmaven
 

That won't be a problem. There is plenty drive available and at low impedence, the signals for X-Y will be at low frequency. A 3B4 will do the job fine, and allow observation of other signals conveniently.

Bruce Gentry, KA2IVY

On 12/17/20 16:00, widgethunter via groups.io wrote:
That could be problematic; the hor input isn't cal'd and it probably won't match the vertical plugin's impedance or gain. For symmetrical x/y displays of equal bw you will likely need 2 identical vertical amps, cal'd to the input sensitivity of the mainframe.
-----Original Message-----
From: greenboxmaven via groups.io <ka2ivy=verizon.net@groups.io>
To: TekScopes@groups.io
Sent: Thu, Dec 17, 2020 9:46 am
Subject: Re: [TekScopes] WTB: 3B4 plug in for RTTY

I want to be able to display other signals as well as the common RTTY
X-Y tuning indication without needing to exchange the modules.

Bruce Gentry, KA2IVY


On 12/17/20 12:38, widgethunter via groups.io wrote:
why not use another vertical plug-in for external hor input?
-----Original Message-----
From: greenboxmaven via groups.io <ka2ivy=verizon.net@groups.io>
To: TekScopes@groups.io
Sent: Wed, Dec 16, 2020 8:37 pm
Subject: [TekScopes] WTB: 3B4 plug in for RTTY

I am going to use the 561B rack mount scope I have restored in an RTTY
setup. The time base I have does not offer an external horizontal
input. A 3B4 or perhaps 3T4 does have it. Does anyone have one to spare?
Thanks,

Bruce Gentry, KA2IVY




















Re: WTB: 3B4 plug in for RTTY

widgethunter
 

That could be problematic; the hor input isn't cal'd and it probably won't match the vertical plugin's impedance or gain. For symmetrical x/y displays of equal bw you will likely need 2 identical vertical amps, cal'd to the input sensitivity of the mainframe.

-----Original Message-----
From: greenboxmaven via groups.io <ka2ivy=verizon.net@groups.io>
To: TekScopes@groups.io
Sent: Thu, Dec 17, 2020 9:46 am
Subject: Re: [TekScopes] WTB: 3B4 plug in for RTTY

I want to be able to display other signals as well as the  common RTTY
X-Y tuning indication without needing to exchange the modules.

      Bruce Gentry, KA2IVY


On 12/17/20 12:38, widgethunter via groups.io wrote:
why not use another vertical plug-in for external hor input?
 
 
 
-----Original Message-----
From: greenboxmaven via groups.io <ka2ivy=verizon.net@groups.io>
To: TekScopes@groups.io
Sent: Wed, Dec 16, 2020 8:37 pm
Subject: [TekScopes] WTB: 3B4 plug in for RTTY

I am going to use the 561B rack mount scope I have restored in an RTTY
setup.  The time base I have does not offer an external horizontal
input. A 3B4 or perhaps 3T4 does have it. Does anyone have one to spare?
Thanks,

Bruce Gentry, KA2IVY












LF: An up to date eBay price list

snapdiode
 

For example, the 1S1 and 1S2 haven't been seen in a long time on eBay, there are none in the "completed listings" and only one 1S1 that's been listed for months.

Who kept tabs on prices in the last few years?


Re: Finding good homes for older Tektronix equipment (547, plugins, 454A)

William Rice
 

Is there info anywhere on how to proceed with this subject in a proper manner? I have some pieces I'd like to let go of.  Thank you all,BillW4MXTSent from my Verizon, Samsung Galaxy smartphone


Lawrance A. Schneider please contact me off list.

Phil Wong
 

Phil1010@verizon.net

-----Original Message-----
From: TekScopes@groups.io <TekScopes@groups.io> On Behalf Of Lawrance A. Schneider
Sent: Thursday, December 17, 2020 7:18 AM
To: TekScopes@groups.io
Subject: Re: [TekScopes] Looking for accessories for 2400 series scopes.

I have cover 200-3199-00 . I think it came off a 2445(?) - I think B.

I also have the pouch in question.

I've offer both to Mr. Cabot, but have received no reply.

If anyone wants them, make an offer.

larry


Re: Alcohol (was: Re: [TekScopes] Remove adhesive from old Tek aluminium cabinet covers)

Dave Seiter
 

Waaayyyy off topic, but what I was fascinated by was the data from toilet paper manufacturers that stated the the *average* TP use was 1/3-1/2 roll per person, per day.  Who uses that much?!  Around here, we go through a roll in about three weeks per person.  (I actually started keeping track)  Of course, these are the large Costco rolls, but still...
-Dave

On Thursday, December 17, 2020, 07:43:53 AM PST, Jeff Dutky <jeff.dutky@gmail.com> wrote:

Many of the COVID-caused supply shortages are just demand shocks: just-in-time manufacturing and delivery is very good if the demand is predictable, but when demand doubles or triples (as happened, for example, with toilet paper) it can take quite a while for supply to readjust. I suspect, however, that another factor in the ongoing shortages is that many manufacturing operations have very little excess labor capacity, and that only a few people out sick is enough to bring entire operations to a halt. It's one thing if you have to cover for one person out sick for a week or two, but when 10% of your staff is out for two weeks you probably don't have enough cross-trained people to cover all positions. Now multiply that across dozens of companies involved in any supply chain and you get massive shortages of all kinds of things, even things that are not directly being demanded by the crisis.

None of this is to say that I completely understand the supply shortages caused by COVID, I just think it's a fascinating example of how complex systems can fail under unexpected conditions.

-- Jeff Dutky


Re: Alcohol (was: Re: [TekScopes] Remove adhesive from old Tek aluminium cabinet covers)

Jean-Paul
 

Bonjour a tous:

1/ successful on the TEK blue covers and adhesive using Goo Gone, and abrasive plastic like ScotchBrite. All clean and no residue.

2/ Amazon has 1 gal 99% iso alc ~ 24 incl free ship. 4 ga $84

Search Isopropyl Alcoho 99%

NO haz mat shipping chg

Jon


Re: Tektronix 317

Bob Albert
 

What is wrong with it?
Bob in North Hills

On Thursday, December 17, 2020, 10:41:45 AM PST, <brockkoren@gmail.com> wrote:

I have a Tektronix 317 and it is not working, I live in San Diego, CA and I am wondering if anyone could recommend a technician or restorer that is in this area. Anywhere is Southern California would be fine.
Thank you,
Brock


Re: Gmail Problems

Dale Chayes
 

Somewhat above the (US) Gmail baseline issues are being reported to Downdetector:

https://downdetector.com/status/gmail/

(Nothing like the fiasco on December 14th.)

-Dale

On Dec 17, 2020, at 13:33 , Dennis Tillman W7pF <dennis@ridesoft.com> wrote:

Apparently Gmail is having serious problems.
Groups.io is bouncing email to some members who have Gmail addresses because
Gmail is rejecting mail directed to its members.
Dennis Tillman W7pF





Re: Alcohol (was: Re: [TekScopes] Remove adhesive from old Tek aluminium cabinet covers)

Jim Ford
 

I just saw 70% and 91% IPA (IsoPropyl Alcohol, not India Pale Ale!) for sale at the local Ralphs supermarket here in Southern California.  Still chuckling at that name Ralphs 32 years after moving from the Northeast, where "ralph" is slang for "to vomit"!   Jim Ford Sent from my Verizon, Samsung Galaxy smartphone

-------- Original message --------From: stevenhorii <sonodocsch@gmail.com> Date: 12/17/20 8:35 AM (GMT-08:00) To: TekScopes@groups.io Subject: Re: Alcohol (was: Re: [TekScopes] Remove adhesive from old Tek aluminium cabinet covers) From what I saw of shortages as COVID-19 turned from an epidemic to apandemic was a near-immediate sell out of rubbing alcohol in pharmacies andsupermarkets (at least the local ones I go to, but they are part ofnational chains) as well as hand sanitizer, sanitizing wipes, Lysol andother disinfecting sprays, and the more newsworthy shortages of toiletpaper and paper towels (oh, and milk, eggs, and bread). I think people werelooking for 99% IPA because there were plenty of Web sites that tell youhow to make your own hand sanitizer, but the final alcohol percentageshould be at least 70-75% according to the CDC so starting with 70% IPA andadding stuff like aloe vera gel and some fragrance will dilute it too much.My colleagues and I joked about buying a high-proof vodka if you didn'tmind the cost. You could then drink what you didn't use to make handsanitizer. There's a Vodka called Spirytus that is 192 proof or 96% ethanol(we looked it up to see if you could actually do this).On Thu, Dec 17, 2020 at 10:44 AM Jeff Dutky <jeff.dutky@gmail.com> wrote:> Many of the COVID-caused supply shortages are just demand shocks:> just-in-time manufacturing and delivery is very good if the demand is> predictable, but when demand doubles or triples (as happened, for example,> with toilet paper) it can take quite a while for supply to readjust. I> suspect, however, that another factor in the ongoing shortages is that many> manufacturing operations have very little excess labor capacity, and that> only a few people out sick is enough to bring entire operations to a halt.> It's one thing if you have to cover for one person out sick for a week or> two, but when 10% of your staff is out for two weeks you probably don't> have enough cross-trained people to cover all positions. Now multiply that> across dozens of companies involved in any supply chain and you get massive> shortages of all kinds of things, even things that are not directly being> demanded by the crisis.>> None of this is to say that I completely understand the supply shortages> caused by COVID, I just think it's a fascinating example of how complex> systems can fail under unexpected conditions.>> -- Jeff Dutky>>> >>>


Re: OT!! Has anyone here shipped items from USA to Chile?? OT!!

Siegmund Souza
 

My family has shipped to relatives in Colombia from the US and like the other gentleman mentioned they now do not use UPS or regular mail.  It can work out however delivery time if its successful can be extremely long - there are pitfalls   They do now use a shipping service/freight forwarder as the other gentleman mentioned that has expertise in shipping to South America.  They will specify what countries they have expertise with.  You would need to find one that knows how to get things properly sent to Chile.  You will pay more to send items with a forwarder/service however it is much more of a certainty the items will get there in a timely fashion without hassles.

On Wednesday, December 16, 2020, 06:13:39 AM EST, Jean-Paul <jonpaul@ix.netcom.com> wrote:

Hello

Shipping from USA to Asia, South America or Mid East is fraught with hazard and compliance issues. Some US products are prohibited to exports as military or dual use.

Customs, haz mat laws, dishonest customs and government officials etc will do everything to delay, stop entry or hold up till excessive fees are paid.

I have no special experience with Chile but have shipped electronic equipment for 40 years.

suggest that the recipients use a freight forwarder with a US based office.

Alternative contact Fed Ex or DHL export division for a quote.

DO NOT USE UPS

Depending on sizes weight value expected to pay for freight, document's and delivery plus any customs tarrifs.

Freight cost can far exceeded shipment value.

Bon Chance


Jon


Re: OT!! Has anyone here shipped items from USA to Chile?? OT!!

Henry Newton
 

The company I used to work for (retired) shipped via FedEx to Santiago many times wo/problems.

If you use a pallet, make sure the pallet has a clear imprint of “HT” meaning the wood has been cooked in a kiln to kill insects, etc.

If you require a custom crate, you must use a crating company that is certified to use HT wood. This means they have a paper trail for their HT wood back to the kiln.

Hope you have a successful shipment.

Henry


Tektronix 317

 

I have a Tektronix 317 and it is not working, I live in San Diego, CA and I am wondering if anyone could recommend a technician or restorer that is in this area. Anywhere is Southern California would be fine.
Thank you,
Brock


Gmail Problems

 

Apparently Gmail is having serious problems.
Groups.io is bouncing email to some members who have Gmail addresses because
Gmail is rejecting mail directed to its members.
Dennis Tillman W7pF


Re: Finding good homes for older Tektronix equipment (547, plugins, 454A)

 

Hi Jeff,
Several TekScopes members are interested in your offer but emails are bouncing from the email address you included in your post.
Please provide an alternate email address or phone number our members can use to contact you directly.
Dennis Tillman W7pF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Dave Peterson via groups.io
Sent: Sunday, December 13, 2020 12:41 PM
To: TekScopes@groups.io
Subject: Re: [TekScopes] Finding good homes for older Tektronix equipment (547, plugins, 454A)

Hi Jeff,
I'm in San Francisco and have been bitten by the TekScope bug. My current focus is 465 Scopes, but can see my horizon's broadening. What do you have?
Dave
On Sunday, December 13, 2020, 12:17:15 PM PST, <nelsonjef@gmail.com> wrote:

I have a handful of older Tek scopes and plugins that I would like to find good homes for. Can someone point me to the appropriate place to post descriptions, please? (Hopefully not ebay.) I'm located in the SF bay area (Santa Rosa). Thanks, Jeff












--
Dennis Tillman W7pF
TekScopes Moderator


Re: Looking for accessories for 2400 series scopes.

Jim Ford
 

I thought that was the infamous Alex S.!   Jim Ford Sent from my Verizon, Samsung Galaxy smartphone

-------- Original message --------From: Chuck Harris <cfharris@erols.com> Date: 12/17/20 7:04 AM (GMT-08:00) To: TekScopes@groups.io Subject: Re: [TekScopes] Looking for accessories for 2400 series scopes. Alex S. is also a supplier of faked 2465B scopes.  He hastaken 2445B scopes, and modified them to appear to be2465B scopes for many, many years.  He has admitted tosuch fraud in emails to me, and to many, many others.One of my customers recently bought a trigger hybridfrom him that was supposedly tested and good, but itwasn't.  A replacement from Q-Service put the scoperight.   Thanks Dinos!Feel free to buy from whomever you want, but I wouldnever buy anything from Alex S.-Chuck HarrisRichard Steedman wrote:> Alexander Schonfeld, who runs "Oscilloscopes Etc", is a good source of 2400 series stuff.  I bought an accessories pouch from him.> You can find his contact details quite easliy on Google.> > > > > >

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