Date   

Re: Question on 1L20

KathnRich <kathnrich@...>
 

----- Original Message -----
From: Phil (VA3UX)
To: TekScopes@yahoogroups.com
Sent: Saturday, May 11, 2002 08:26 PM
Subject: Re: [TekScopes] Question on 1L20


At 11:18 PM 5/11/2002 -0700, you wrote:
>Thanks Phil;
> Almost seems not worth selling being such a rare item that is and how
> much fun it was to use. I think I'll change course a little and
> concentrate on a nice used 547, get it fired up and go thata-way. I know
> it worked great just before it sat untouched 15 years ago. Know of any
> nice 547's in the Jersey area? I've had it since I was 25 years old. I am
> now 52. Would be kinda neat to get her going again.

Sorry Rich but off-hand I don't know any scope owners in the Jersey
area. You might want to try Ed Hare at ARRL head quarters in Newington,
CT. I know he had some mainframes he was looking to get rid-of not too long
ago. Ed's e-mail address is :

w1rfi@arrl.org

If you make the trip to the Dayton Hamvention next weekend you're
practically guaranteed to find one (or many).

Phil

>Thanks for the advise,,,Rich
> ----- Original Message -----
> From: Phil (VA3UX)
> To: TekScopes@yahoogroups.com
> Sent: Saturday, May 11, 2002 08:05 PM
> Subject: Re: [TekScopes] Question on 1L20
>
>
> At 08:11 PM 5/11/2002 -0700, you wrote:
> >Would anyone know the value of a known working 1L20 Spectrum Analyzer?
> >And,,,will it work in a 547 Tek.
>
> The last few that sold on eBay went for between $120 and $190. Yes, it
> will
> certainly work in a 547.
>
> Phil
>
> >Thanks,,,Rich
> >
> >
> >
> >
> >
> >
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> >
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Re: 547 For sale?

KathnRich <kathnrich@...>
 

I saw the 547 and questioned the gentleman on Ebay of about his location but have not received a reply as to where he is. I would much rather pick the unit up than have such a heavy piece of gear shipped.
Rich,,,

----- Original Message -----
From: Phil (VA3UX)
To: TekScopes@yahoogroups.com
Sent: Saturday, May 11, 2002 08:12 PM
Subject: Re: [TekScopes] 547 For sale?


At 08:24 PM 5/11/2002 -0700, you wrote:
>Does anyone in the group have a 547 for sale. I am looking to get my 1L20
>plug-in working and need the scope body.
>Thanks,,,Rich

There is one for sale right now on eBay. It ends in a day or so :


http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=1729377764


There may be others here that can supply you with one. If nothing turns
up, let me know because I have two (maybe 3) 547s.

Phil


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Re: Question on 1L20

KathnRich <kathnrich@...>
 

Thanks Phil;
Almost seems not worth selling being such a rare item that is and how much fun it was to use. I think I'll change course a little and concentrate on a nice used 547, get it fired up and go thata-way. I know it worked great just before it sat untouched 15 years ago. Know of any nice 547's in the Jersey area? I've had it since I was 25 years old. I am now 52. Would be kinda neat to get her going again.
Thanks for the advise,,,Rich

----- Original Message -----
From: Phil (VA3UX)
To: TekScopes@yahoogroups.com
Sent: Saturday, May 11, 2002 08:05 PM
Subject: Re: [TekScopes] Question on 1L20


At 08:11 PM 5/11/2002 -0700, you wrote:
>Would anyone know the value of a known working 1L20 Spectrum Analyzer?
>And,,,will it work in a 547 Tek.

The last few that sold on eBay went for between $120 and $190. Yes, it will
certainly work in a 547.

Phil

>Thanks,,,Rich
>
>
>
>
>
>
>To unsubscribe from this group, send an email to:
>TekScopes-unsubscribe@yahoogroups.com
>
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/



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Re: Question on 1L20

Phil (VA3UX) <phil@...>
 

At 11:18 PM 5/11/2002 -0700, you wrote:
Thanks Phil;
Almost seems not worth selling being such a rare item that is and how much fun it was to use. I think I'll change course a little and concentrate on a nice used 547, get it fired up and go thata-way. I know it worked great just before it sat untouched 15 years ago. Know of any nice 547's in the Jersey area? I've had it since I was 25 years old. I am now 52. Would be kinda neat to get her going again.
Sorry Rich but off-hand I don't know any scope owners in the Jersey area. You might want to try Ed Hare at ARRL head quarters in Newington, CT. I know he had some mainframes he was looking to get rid-of not too long ago. Ed's e-mail address is :

w1rfi@arrl.org

If you make the trip to the Dayton Hamvention next weekend you're practically guaranteed to find one (or many).

Phil

Thanks for the advise,,,Rich
----- Original Message -----
From: Phil (VA3UX)
To: TekScopes@yahoogroups.com
Sent: Saturday, May 11, 2002 08:05 PM
Subject: Re: [TekScopes] Question on 1L20


At 08:11 PM 5/11/2002 -0700, you wrote:
>Would anyone know the value of a known working 1L20 Spectrum Analyzer?
>And,,,will it work in a 547 Tek.

The last few that sold on eBay went for between $120 and $190. Yes, it will
certainly work in a 547.

Phil

>Thanks,,,Rich
>
>
>
>
>
>
>To unsubscribe from this group, send an email to:
>TekScopes-unsubscribe@yahoogroups.com
>
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/



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547 For sale?

KathnRich <kathnrich@...>
 

Does anyone in the group have a 547 for sale. I am looking to get my 1L20 plug-in working and need the scope body.
Thanks,,,Rich


Re: 547 For sale?

Phil (VA3UX) <phil@...>
 

At 08:24 PM 5/11/2002 -0700, you wrote:
Does anyone in the group have a 547 for sale. I am looking to get my 1L20 plug-in working and need the scope body.
Thanks,,,Rich
There is one for sale right now on eBay. It ends in a day or so :


http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=1729377764


There may be others here that can supply you with one. If nothing turns up, let me know because I have two (maybe 3) 547s.

Phil






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Question on 1L20

KathnRich <kathnrich@...>
 

Would anyone know the value of a known working 1L20 Spectrum Analyzer? And,,,will it work in a 547 Tek.
Thanks,,,Rich


Re: Question on 1L20

Phil (VA3UX) <phil@...>
 

At 08:11 PM 5/11/2002 -0700, you wrote:
Would anyone know the value of a known working 1L20 Spectrum Analyzer? And,,,will it work in a 547 Tek.
The last few that sold on eBay went for between $120 and $190. Yes, it will certainly work in a 547.

Phil

Thanks,,,Rich






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Re: Question on 1L20

Craig Sawyers <c.sawyers@...>
 

Would anyone know the value of a known working 1L20 Spectrum
Analyzer? And,,,will it work in a 547 Tek.
Thanks,,,Rich
Phil's site (http://www.vaxxine.com/phil/scopes/plugin$.htm) says that eBay
auctions are getting an average of around $160 - but they only come up for
auction pretty rarely so the statistics are sparse.

Craig


Re: Help with DM 501 AC current cal

deanhuster <dhuster@...>
 

Matthias,

I assume that you don't have a manual? E-mail me: dhhuster at
semo.net, we'll connect and I'll see if I can scan a few necessary
pages to get you going.

Dean


Re: Help with DM 501 AC current cal

Matthias Urban
 

Thank you Dean for your explanations regarding the DM 501.

Having read more about DMMs I found that the AC current measurement accuracy of 1% measuring a value of 10 uA is not so easy to find.

The DM 511 (specs from TEGAM) states 0.8% of reading + 0.05% of scale. If I am right this makes at a reading of 10uA an accuracy of +/- 108 nA. I guess this is acceptable if a 1% accuracy is requested. A good calibration job should do it, right?

Do you have the accuracy data of the DM 501? is it much worse than the DM511 accuracywise ? The measurement I intend to do is at line frequency and shape so I guess the TRMS feature is not really necessary.

I have the feeling the TM501 I have bought is in a good shape and it would be a shame not to use it in a demanding application like it deserves...

Thanks for your help.

Matthias




-----Urspr√ľngliche Nachricht-----
Von: deanhuster
An: TekScopes@yahoogroups.com
Gesendet: martes, 07 de mayo de 2002 18:33
Betreff: [TekScopes] Re: Help with DM 501 AC current cal


The DM501 is an average-reading, RMS indicating meter on ac. The
DM501A is the true-RMS meter. As I recall, on ACV, you have three
adjustments to make for flattening the frequency response curve. The
ACA ranges are a check only and use the same shunts as the DC ranges,
so everything should fall into place.

Tek was a little strange with their meters. When they came out with
the DM40 backpack, the Service Centers were screwed, for none of them
had the equipment with which to calibrate them. They were really in
a world of hurt with the 213. It was a very precise (0.1%) true-rms
puppy and there wasn't nobody could calibrate it. I wouldn't even
hazard a guess as to how many Service Centers slapped a calibration
sticker on those things using nothing better than a PG506 for a
standard. At the time, even Fluke was barely coming up with the
standards to work DMMs.

Dean



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Re: 2235 bad CRT revisted (help needed)

Peter Florance
 

thanks for the reply.
the tube with distorted image has loose items inside. The phosphor is
spotted from the items hitting the front.
If I move or rotate the scope the shape of the distortion changes. Finally
it arced inside but still displayed the distored trace, so I stopped that
test before I damaged the power supply.

I've already packed up the Ebay tube (scope won't power up) to return to
the seller. I checked the filament resistance before I packed it back and
it was about 16 ohms (same as distorted tube)

Cheers

Peter

-----Original Message-----
From: pe1fbo [SMTP:fjdvries@zonnet.nl]
Sent: Wednesday, May 08, 2002 3:16 AM
To: TekScopes@yahoogroups.com
Subject: [TekScopes] Re: 2235 bad CRT revisted (help needed)

Hi Peter,

I had a similar experience a few years ago. My 465 had a bad CRT, the
scan expansion mesh was disconnected inside the tube. The effect was
that if you turned on the beam, the hole image shrunk. At that time I
ordered a replacement tube, which was said to be tested good on the
filament. When it arrived I placed it in the 465 and got very
disappointed that it did not gave me a beam at all. I checked again
all HV supplies and that was OK. Further investigation showed that
the getter flash on was almost gone. This was a good indication that
the tube was gassy. I have learned that second hand CRTs are a big
risk. Finally I got a junker 465 with a good tube, that one still
works OK.

In your case, could it be that the metal screening has become
magnetized, distorting the image ?. Concerning the PSU maybe the
filament is short. try to connect a 6.3Volts PSU to CRT pins 1 & 14 (
I think) it should draw 100..300mA


Fred de Vries



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Re: 465 and e-mail

aquaman8_2001
 

Hi Mark,

Thanks for the advice. I was planning on looking at ripple and ESR on
the electrolytics and changing out those that needed it, but just
swapping based on age sounds like a good idea.

I love the scope and think it deserves to run like new!

Mitch

--- In TekScopes@y..., Mark Allen <cinerama84106@y...> wrote:
I just went through a similar thing as you. My
problem was not the calibrator though just the main
supply caps. I went through the entore scope and
replaced all the electrolytics and I think that taking
the age of these into consideration its a really good
place to start when restoring one of these scopes. The
power supply caps in mine were dated 3 of 76 so thats
a long time on these main caps. My scope operates and
looks like new after the rebuild. I would be curious
as to the date code on yours. BTW: Mine had the DM on
top and I also pulled the supply for that and rebuilt
it as well. Its been fully calibrated and is lots of
fun to use.
I think a 7000 series scope is in order next when I
find a nice one needing restoration......anyone have a
good deal on one please let me know. Non-Storage type
please.
Mark Gulbrandsen
Salt Lake City, Utah




--- aquaman8_2001 <aquaman8_2001@y...> wrote:
Hi Dwight,

I have sent you an email to your sacranet address.
Hope it gets
through and you get my address OK.

Was wondering if you could tell me if the cap I
asked about was part
of the pws section and if so what part. I ask
because it looks bad
based on the electrolyte leak, but I can't seem to
see any symptoms
while testing out the scope.

Thanks,


Mitch

--- In TekScopes@y..., Dwight Finger <dfinger@k...>
wrote:
Hi again,

There's still a problem with me accessing things.
Your address was
truncated and I cannot follow the link to your
full address. Pls
communicate directly to dfinger @ sacranet.com
(remove spaces)

- Dwight


[Non-text portions of this message have been
removed]


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Re: 2235 bad CRT revisted (help needed)

pe1fbo
 

Hi Peter,

I had a similar experience a few years ago. My 465 had a bad CRT, the
scan expansion mesh was disconnected inside the tube. The effect was
that if you turned on the beam, the hole image shrunk. At that time I
ordered a replacement tube, which was said to be tested good on the
filament. When it arrived I placed it in the 465 and got very
disappointed that it did not gave me a beam at all. I checked again
all HV supplies and that was OK. Further investigation showed that
the getter flash on was almost gone. This was a good indication that
the tube was gassy. I have learned that second hand CRTs are a big
risk. Finally I got a junker 465 with a good tube, that one still
works OK.

In your case, could it be that the metal screening has become
magnetized, distorting the image ?. Concerning the PSU maybe the
filament is short. try to connect a 6.3Volts PSU to CRT pins 1 & 14 (
I think) it should draw 100..300mA


Fred de Vries


Re: 465 and e-mail

cinerama84106
 

I just went through a similar thing as you. My
problem was not the calibrator though just the main
supply caps. I went through the entore scope and
replaced all the electrolytics and I think that taking
the age of these into consideration its a really good
place to start when restoring one of these scopes. The
power supply caps in mine were dated 3 of 76 so thats
a long time on these main caps. My scope operates and
looks like new after the rebuild. I would be curious
as to the date code on yours. BTW: Mine had the DM on
top and I also pulled the supply for that and rebuilt
it as well. Its been fully calibrated and is lots of
fun to use.
I think a 7000 series scope is in order next when I
find a nice one needing restoration......anyone have a
good deal on one please let me know. Non-Storage type
please.
Mark Gulbrandsen
Salt Lake City, Utah




--- aquaman8_2001 <aquaman8_2001@yahoo.com> wrote:
Hi Dwight,

I have sent you an email to your sacranet address.
Hope it gets
through and you get my address OK.

Was wondering if you could tell me if the cap I
asked about was part
of the pws section and if so what part. I ask
because it looks bad
based on the electrolyte leak, but I can't seem to
see any symptoms
while testing out the scope.

Thanks,


Mitch

--- In TekScopes@y..., Dwight Finger <dfinger@k...>
wrote:
Hi again,

There's still a problem with me accessing things.
Your address was
truncated and I cannot follow the link to your
full address. Pls
communicate directly to dfinger @ sacranet.com
(remove spaces)

- Dwight


[Non-text portions of this message have been
removed]


__________________________________________________
Do You Yahoo!?
Yahoo! Health - your guide to health and wellness
http://health.yahoo.com


Re: 465 and e-mail

aquaman8_2001
 

Hi Dwight,

I have sent you an email to your sacranet address. Hope it gets
through and you get my address OK.

Was wondering if you could tell me if the cap I asked about was part
of the pws section and if so what part. I ask because it looks bad
based on the electrolyte leak, but I can't seem to see any symptoms
while testing out the scope.

Thanks,


Mitch

--- In TekScopes@y..., Dwight Finger <dfinger@k...> wrote:
Hi again,

There's still a problem with me accessing things. Your address was
truncated and I cannot follow the link to your full address. Pls
communicate directly to dfinger @ sacranet.com (remove spaces)

- Dwight



2235 bad CRT revisted (help needed)

Peter Florance
 

I started playing with this problem last summer. Bought a 2235 and the tube
had horrible geometry.
Bought a used tube and it also had bad geometry in a different place. This
tube had been shipped to me in a very small box and like the original tube,
has loose bits floating around in it. The distortion was predictable and
repeatable in each tube, in locations unique to that tube. Seller takes the
tube
So I buy another used tube on ebay and install it. With this tube the scope
will not power up; the supply cycles on for a brief instant then shuts down
(about once a second). there's a squeal each time it powers up and the
lights come on briefly. Seller says his tech had checked it before
shipment.
I checked socket pins with ohmeter and except for the filaments, no other
pin is connected to anything else. A little capacitance but it charges up
and reads open.

All three tubes are/were Tek # 154-0861-00

Am I screwing up here or do I just have really bad Karma?

Thanks
Peter Florance CET/CSM
Audio Services
544 Central Drive
Suite 101
Virginia Beach, VA 23454
757.498.8277
757.498.9554 Fax
email: mailto:audserv@exis.net
http://www.audio-services.com


465 and e-mail

dbfinger
 

Hi again,

There's still a problem with me accessing things. Your address was
truncated and I cannot follow the link to your full address. Pls
communicate directly to dfinger @ sacranet.com (remove spaces)

- Dwight


Re: 465

aquaman8_2001
 

Thanks for your help Dwight. It is much appreciated.

Not sure what is wrong with the aquaman8 address but you can email me
at my work email which is

mitch.sisak@lotek.com

Thanks again,

Mitch

--- In TekScopes@y..., Dwight Finger <dfinger@k...> wrote:
Mitch,

The capacitor next to Q1532 is C1534, 3 uf 150v. I may be able to
scan
the calibrator circuit this evening at home and get it to you
tomorrow.
Let me know where to e-mail the pic, I can't seem to get your
address or
post replies on the board.

- Dwight



465

dbfinger
 

Mitch,

The capacitor next to Q1532 is C1534, 3 uf 150v. I may be able to scan
the calibrator circuit this evening at home and get it to you tomorrow.
Let me know where to e-mail the pic, I can't seem to get your address or
post replies on the board.

- Dwight

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