Date   

Re: Wanted : plug-in 100x attenuator module [part number: 307-1014-10] to restore a Tek 475

Dave Casey
 

I have both 307-1014-00 and 307-1014-01 to offer; brand new, never used.
But I do not have the -10.
The -00 and -01 are both 100x. The -10 is either just a later version or
perhaps designed to terminate differently? The 7D15 and 7A15A use the -00
and later the -01. The 7A18A uses the -01.
Haven't checked the 475 manual to see if earlier serials used the earlier
version or not.

Dave Casey

On Sat, Jan 13, 2018 at 12:26 AM, Harvey White <madyn@...>
wrote:

On Thu, 11 Jan 2018 19:24:58 -0800, you wrote:

Does anybody have a parts mule thet can scavenge so I can complete this
`scope [or advise where I can get this 100x attenuator module]

All I have is a 307-1014-01. Not sure that it would be the same.

Harvey



Thankyou...................................................
...............................................Donald Collie ZL4GX





Re: Wanted : plug-in 100x attenuator module [part number: 307-1014-10] to restore a Tek 475

Harvey White
 

On Thu, 11 Jan 2018 19:24:58 -0800, you wrote:

Does anybody have a parts mule thet can scavenge so I can complete this `scope [or advise where I can get this 100x attenuator module]
All I have is a 307-1014-01. Not sure that it would be the same.

Harvey



Thankyou..................................................................................................Donald Collie ZL4GX


Re: Wanted : plug-in 100x attenuator module [part number: 307-1014-10] to restore a Tek 475

 

Hi Don,
What scope? And what is the part number of the 100X Attenuator?

Dennis Tillman W7PF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of donald collie
Sent: Thursday, January 11, 2018 7:25 PM
Subject: [TekScopes] Wanted : plug-in 100x attenuator module [part number: 307-1014-10] to restore a Tek 475

Does anybody have a parts mule thet can scavenge so I can complete this `scope [or advise where I can get this 100x attenuator module] Thankyou................................................................................................Donald Collie ZL4GX





--
Dennis Tillman W7PF
TekScopes Moderator


Re: Wanted : plug-in 100x attenuator module [part number: 307-1014-10] to restore a Tek 475

John Gord
 

Donald,

Is the attenuator missing or is it defective? If defective, you might be able to fix it by opening it up and resoldering the pin-to-ceramic connections. They often develop some sort of intermetallic compound that causes opens at that point.

--John Gord

On Fri, Jan 12, 2018 at 05:19 pm, donald collie wrote:


Does anybody have a parts mule thet can scavenge so I can complete this `scope
[or advise where I can get this 100x attenuator module]
Thankyou..................................................................................................Donald
Collie ZL4GX


Re: Tek Blue Paint Color

Gary Robert Bosworth
 

Sam: In case you have not seen this before, there is a spray-on paint
called Krylon Bahama Sea and it is excellent for full coverage painting of
Tektronix panels. It is not good for touch-up because there is a slight
difference in paint tone, but a completely covered surface is
indistinguishable under all lighting. Sherwin Williams will order the cans
for you and they are only about $6.00 each. Definitely saves you a lot of
misery and cost of trying to mix your own.

Gary

On Thu, Jan 11, 2018 at 6:43 PM, Sam Reaves <sam.reaves@...> wrote:

Does anyone have the CMYK or RGB Codes or other data so one can have this
paint mixed locally?

Sam
W3OHM



--
Gary Robert Bosworth
@grbosworth
Tel: 310-317-2247


Re: Transistor Cross Reference - Now N101 transistor info

Jon Batters
 

Hi Dave. , Usually easy to find the Logo on Google Search. Otherwise take close-up photo of Logo and post here. I have 4 books of electronic OEM Logos that can be easier to use then Google and cover from the old days of 1960's and one trackes OEMs that have gone onto new OEMs..

Jon Batters, Oregon


Re: Tek 475 HV multiplier replacement

n4buq
 

Sphere may have a replacement.

Thanks,
Barry - N4BUQ

----- Original Message -----
From: "Dieter" <ditt1@...>
To: TekScopes@groups.io
Sent: Wednesday, January 10, 2018 10:18:06 AM
Subject: [TekScopes] Tek 475 HV multiplier replacement

Hi,
the HV multiplier in my Tek 475 is defective. I will replace it with a
multiplier HRT507.
This is done several times as I have read in several forums.
My question is how to connect the HV-lead from the new multiplier to the
original HV-cable, so that no sparks will come out.
Any tips will be wellcome.
Thank you
Dieter




Help restoring a 547 scope

felix_cantor@...
 

Hello everyone! New guy in town here ;)

I just purchased an used 547 that I want to fully restore.

It was in working condition when I bought it but the traces and the trigger systems didn`t work that well. Channel B didn`t even trigger.
The interior was quite dusty and dirty, so I decided to give it a bath as per the manual recommendation. I covered the transformer and took great care not to wet it and also not to wet the high voltage section for the CRT. After the wash I placed it at the sun for around 2 days and kept it in the house for another 4 days or so before trying to turn it on again. After that I plugged the unit to a current limiter just in case something was wrong with the scope after the wetting, and it seemingly was broken! The light was at full bright when I turned on the scope though the scope remained without any sign of being powered up. So I guess there is a short right at the beginning of the power section....

I`m some sort of an amateur so I`m not so sure how to proceed right now without screwing up the scope anymore. I`ve build a few tube amplifiers and restored a few old test equipment, so I know the basics really.

Any help will be very much appreciated.

Thanks.
F.


Tek 475 attenuator module [100x]...missing

donald collie
 

I`ve just been restoring a Tek 475, only to find after clearing all the faults that the little 100x attenuator module [part # 307-1014-10] is missing. Can anyone advise me where I might obtain this part? Alternatively, would someone like to swap one out of that parts mule 475, for cash. Thankyou.....................................................................................Donald Collie ZL4GX


Mail Check

Dick
 

Every time I go to the Groups.io page (yes, every time), it says my account is bouncing.

I "un-bounce" it, but later when I go back, it says I am bouncing again.


This is to check if I am receiving mail despite that message.


73, Dick, W1KSZ


Sent from Outlook<http://aka.ms/weboutlook>


Tek 475 HV multiplier replacement

Dieter <ditt1@...>
 

Hi,
the HV multiplier in my Tek 475 is defective. I will replace it with a multiplier HRT507.
This is done several times as I have read in several forums.
My question is how to connect the HV-lead from the new multiplier to the
original HV-cable, so that no sparks will come out.
Any tips will be wellcome.
Thank you
Dieter


Raparing my "new" 547 Tel scope

felix_cantor@...
 

Hi everyone, new guy in town here....

I just purchased an old tek 547 that I started restoring and I just had the first BIG problem I guess.... When I purchased it it did work to some extent, it did fire up, tough the trace and triggering didnt seem very good. I thought the best thing to do as a first step was to give it the so called "wash" as it is suggested in the manual.

I took all the tubes out and carefully labeled them so that they would go back to their original position. Covered the transformer to make sure it wouldn´t get wet and proceeded with the wash, very carefully with a little bit of dish soap diluted in water and then rinsed it out. I tried to use the least water possible. Then I put it at full sun (here its summer) for around two days and then inside the house for another four days or so.

Today I tried to fire it up for the first time using a current limiter just in case something was screwed up, so that i wouldn`t damage the scope but it didnt turn on at all and the lamp from the current limiter turned lighted up at full bright! ...so i guess something is wrong. Sadly.

I`m not sure how to start finding out what the problem is, without taking risks of further damaging the scope. I`m a bit of an amateur, though i´ve built a few tube amplifiers, so, I know the basics.

Any help will be very much appreciated.

Thank you very much.

Felix


Wanted : plug-in 100x attenuator module [part number: 307-1014-10] to restore a Tek 475

donald collie
 

Does anybody have a parts mule thet can scavenge so I can complete this `scope [or advise where I can get this 100x attenuator module] Thankyou..................................................................................................Donald Collie ZL4GX


Tek Blue Paint Color

Sam Reaves
 

Does anyone have the CMYK or RGB Codes or other data so one can have this paint mixed locally?

Sam
W3OHM


Re: Metrotek MG701

Joe Laffey
 

On Fri, 12 Jan 2018, Lyle Bickley wrote:

On Fri, 12 Jan 2018 18:13:24 -0600 (CST)
"Joe Laffey" <joe@...> wrote:

Anyone know anything about the Metrotek MG701 tm500 plugin?

Anyone interested in one? I saw four at a local store.
Here's a bit of information and pictures on what they are:
http://w140.com/tekwiki/wiki/Metrotek_MG701
Thanks. I had checked there. It has some pictures, but no description.

Let me know if anyone needs/wants one. Like I said, I saw four here locally.

--
73
Joe Laffey


Re: OT: need special water line adapter or fittings

Michael A. Terrell
 

-----Original Message-----
From: Bill Riches <@neff1942>
Sent: Jan 12, 2018 5:44 PM
To: TekScopes@groups.io
Subject: Re: [TekScopes] OT: need special water line adapter or fittings

Hi Ed,

Could you forget about the existing pipe and stub a new one up through the floor outside the wall (inside the room) or cut a channel out of the wall board and run a new stub inside the wall through the floor and stick a valve on it and connect fridge to the valve with a long flex hose. Good luck!

73,

Bill, WA2DVU
Cape May

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Ed Breya via Groups.Io
Sent: Friday, January 12, 2018 4:30 PM
To: TekScopes@groups.io
Subject: [TekScopes] OT: need special water line adapter or fittings

The old Sub-Zero frig recently crapped out, and despite my fixing it a number of times over twenty years, we finally decided it was time for a new one It used to be fairly simple parts replacement or refilling, but too many big things were problematic this time. Anyway, the new one will be here in about three weeks. The dealer's guys came over today to pull the old carcass and check for the fit of the fresh one, and set up a loaner frig for the interim. It turns out that the water supply line valve box in the wall is in a bad spot, and bad orientation, so will have insufficient clearance to the back of the new frig for the water line connection. The valve outlet faces straight out, and it can't be rotated without grief (sweated to Cu tubing in wall). The new line is the braided flex type with 1/4" tube compression fittings, and if it's put on the valve directly, would get sharply kinked getting squeezed into the 1" or so clearance. I found that the same problem existed even with the original frig - it had Cu tubing all the way, and it was kinked badly right at the compression nut, but fortunately never leaked. So much for re-using the old line.

So, there are a number of solutions possible, and some quite easy if I can find the right kind of feed line or fittings. The simplest would be a hose with a low-profile 90 degree connection at one end, that can go out of the valve and immediately turn parallel to the wall. Next would be a right-angle elbow with compression fits both ends, but the tricky part is it would need a special end. Adding any kind of a nipple in between the valve and the elbow would defeat the purpose. Lastly, I could make a tube section with a very sharp pre-bend and then cut to size and bead it, to use as the elbow/adapter.

I have searched quite a bit for various fittings and hoses with 90 deg ends, but no luck so far. These are compression type brass fittings for 1/4" Cu tube, with the bead style ferrules. The problem is that most are made to take Cu tubing with the bead and nut, but I need the opposite - the elbow must have one end with these features as if it's the end of a tube. The other end can be compression or 1/8" NPT - no problem once the initial 90 deg is turned, since there's plenty of clearance for adapting downstream. I know these opposite ones exist in the type of fitting that uses the conical ferrule (I have some), but don't know about the bead type. So far. it looks like no.

So, after this long and fascinating story, does anyone know of such fittings, or adapters, or 1/4" water supply hoses with one 90 degree end (they appear to be available in the bigger sizes)? It's not an emergency, but I'd like to have a solution in-hand well before the new frig arrives.

Ed






Michael A. Terrell


Re: Metrotek MG701

Lyle Bickley
 

On Fri, 12 Jan 2018 18:13:24 -0600 (CST)
"Joe Laffey" <joe@...> wrote:

Anyone know anything about the Metrotek MG701 tm500 plugin?

Anyone interested in one? I saw four at a local store.
Here's a bit of information and pictures on what they are:
http://w140.com/tekwiki/wiki/Metrotek_MG701

Lyle
--
Lyle Bickley
AF6WS '73
http://bickleywest.com
"Black holes are where God is dividing by zero"


Metrotek MG701

Joe Laffey
 

Anyone know anything about the Metrotek MG701 tm500 plugin?

Anyone interested in one? I saw four at a local store.


--
73
Joe Laffey


Re: Source for long chassis mount BNC connector

Dave Daniel
 

I don't know about three weeks; the first couple of times I purchased from Qservice, the parts seemed to show up pretty quickly. I didn't realize at the time that Qservice was in Greece. When I found out later, I was surprised to find that they could get parts to me as quickly as they did.

I ordered directly from the Qservice website, not their ebay site. Maybe things have changed.

DaveD

On 1/12/2018 4:32 PM, Manuel Maseda wrote:
I also found out the Tektronix part # is 131-0955-00 and the Specialty Connector Co part # is 28JR200-1. Qservice has some listed on EBay but I really don’t want to wait 3 weeks for shipment from Greece.


Re: OT: need special water line adapter or fittings

Doug Blodgett <photopro@...>
 

I'm not as sharp as I used to be in understanding things, but would something like this do the job.  It's available in 1/4" fitting.https://www.mcmaster.com/#hose-connectors/=1b3mhg3








From: Ed Breya via Groups.Io <edbreya=yahoo.com@groups.io>
To: TekScopes@groups.io
Sent: Friday, January 12, 2018 1:29 PM
Subject: [TekScopes] OT: need special water line adapter or fittings

The old Sub-Zero frig recently crapped out, and despite my fixing it a number of times over twenty years, we finally decided it was time for a new one. It used to be fairly simple parts replacement or refilling, but too many big things were problematic this time. Anyway, the new one will be here in about three weeks. The dealer's guys came over today to pull the old carcass and check for the fit of the fresh one, and set up a loaner frig for the interim. It turns out that the water supply line valve box in the wall is in a bad spot, and bad orientation, so will have insufficient clearance to the back of the new frig for the water line connection. The valve outlet faces straight out, and it can't be rotated without grief (sweated to Cu tubing in wall). The new line is the braided flex type with 1/4" tube compression fittings, and if it's put on the valve directly, would get sharply kinked getting squeezed into the 1" or so clearance. I found that the same problem existed even with the original frig - it had Cu tubing all the way, and it was kinked badly right at the compression nut, but fortunately never leaked. So much for re-using the old line.

So, there are a number of solutions possible, and some quite easy if I can find the right kind of feed line or fittings. The simplest would be a hose with a low-profile 90 degree connection at one end, that can go out of the valve and immediately turn parallel to the wall. Next would be a right-angle elbow with compression fits both ends, but the tricky part is it would need a special end. Adding any kind of a nipple in between the valve and the elbow would defeat the purpose. Lastly, I could  make a tube section with a very sharp pre-bend and then cut to size and bead it, to use as the elbow/adapter.

I have searched quite a bit for various fittings and hoses with 90 deg ends, but no luck so far. These are compression type brass fittings for 1/4" Cu tube, with the bead style ferrules. The problem is that most are made to take Cu tubing with the bead and nut, but I need the opposite - the elbow must have one end with these features as if it's the end of a tube. The other end can be compression or 1/8" NPT - no problem once the initial 90 deg is turned, since there's plenty of clearance for adapting downstream. I know these opposite ones exist in the type of fitting that uses the conical ferrule (I have some), but don't know about the bead type. So far. it looks like no.

So, after this long and fascinating story, does anyone know of such fittings, or adapters, or 1/4" water supply hoses with one 90 degree end (they appear to be available in the bigger sizes)? It's not an emergency, but I'd like to have a solution in-hand well before the new frig arrives.

Ed