Date   

Re: OT: AT5005 spectrum analyzer display

 

You have the one on hand are Chinese type CRT , may not direct replacement .
Tony

From: Ed Breya via Groups.Io <edbreya=yahoo.com@groups.io>
To: TekScopes@groups.io
Sent: Monday, June 11, 2018 10:56 AM
Subject: Re: [TekScopes] OT: AT5005 spectrum analyzer display

The HM5010 manual schematics shows the CRT is D14-364, which googles out to be very common, and Hameg uses it in some of there other products.

Ed


Re: Off Topic: Wanted Spectracom 8212 Chart Recorder Manual

Jim Olson <v_12eng@...>
 

This is also off topic I am a new comer to the site and also getting into Tek o'scopes have picked up some dead 400 scopes to play with.
Found this site by browsing for info, manuals etc. and i have noticed that most of the folks on here are Ham Radio license operators. Is this a requirement to play with the older Tek scopes or just a coincidense as one would be handy setting up receivers and transmitters as I recall from my radio and electronics classes in High School back in the dark ages. i actually had a complete radio set from a WW II Grumman TBM with all the tuning boxes and the Dynamoter ran it off a pair of 12v batteries. Never got my license back then as it was really complicated for a high school kid got it to use in my involvement with the CAP also my pilots license.
have always loved working with electronic busy stuff so I will have fun testing, trouble shooting and repairing these things.
Just a little back ground have been a gear head forever plus amature IT type guy did 17yrs in the Navy air reserve as a Aircraft Electrician on various planes ending with the FA-18.
Enough for now

Jim Olson AE1ret.


Re: OT: Old ICs for sale

G Hopper
 

Well, the seller seems a bit full of himself and full of hyperbole: "...while I’d wager every last chip is good, ..., they are sold as-is."

In other words, "I'll engage in a bit of puffery and unsupported claims, and then disclaim all that by selling them as-is." If he won't guarantee them, he's not really willing to wager that "every last chip" is in fact good, is he?

I suppose that for $55 there probably is some value in that offering even if some of the chips are dead. I do have to chuckle since I have some of the same stuff as NOS in my parts drawers and amongst the boxes I've inherited from others. Never really considered the possibility that any of it had value. "There's gold in them there drawers!!!!"


Locating repair parts for P6131 probe(s)

G Hopper
 

I'm wondering if anyone has a suggestion for replacement parts sources besides looking on eBay.

I received four Tek P6131 probes all in the same condition with a 2432 I purchased. The BNC connector/Compensation box, and the cable are fine. The Probe Tip/Hybrid Tip is in rough shape (some are slightly bent, others are dented.) there is nothing else. No tip, no ground lead or place to connect it, no body.

I have the part numbers from the manual and have googled them, but even the Tek web site doesn't seem to have a way to purchase individual parts. Ebay had a few of the pieces but not everything and not as many as I need.

I'd really hate to buy another set of probes (and consequently sell or part these out) when I have what is a good start to a set of probes for this scope.

Anyone have a suggestion as to how to find the parts I need?

Regards,
Grant Hopper


Re: Off Topic: Wanted Spectracom 8212 Chart Recorder Manual

 

Hi Ed,

Yes, if you connect all three windings together you do get about 67VAC (25VAC + 25VAC + 17VAC) but that is not 110VAC by any stretch. You have an intriguing idea if the plugin did actually plug into two backplane connectors. But it only plugs into one backplane connector on the rear.

But you got me thinking it must have a transformer in it to boost the (25VAC + 25VAC) to 110VAC even though the chart recorder takes up most of the double wide space, so I looked carefully and there is a very flat form factor transformer on one side. You have to remove the side cover to find it. So that is how they must be doing it. I bet they use the +/-33VDC or the +11VDC windings to power the rest of the unit

Dennis Tillman W7PF

Dennis Tillman W7PF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Ed
Breya via Groups.Io
Sent: Sunday, June 10, 2018 6:42 PM
To: TekScopes@groups.io
Subject: Re: [TekScopes] Off Topic: Wanted Spectracom 8212 Chart
Recorder Manual

Dennis, remember the TM500 has AC power available inside by virtue of
the floating LV AC windings - two per slot, so two slots could give
four windings at 24V-30V (I forget the specs) each that could add up
to around 110-120V (especially if that's the only load) - probably
close enough. Or, a single winding through a small step-up transformer
could do it to. I presume the chart paper drive is one of those old-
school synchronous clock motors with built-in gearbox to get whatever
speed is needed. Those only take about 3W, as I recall.

Ed



--
Dennis Tillman W7PF
TekScopes Moderator


Re: OT: AT5005 spectrum analyzer display

Ed Breya
 

The HM5010 manual schematics shows the CRT is D14-364, which googles out to be very common, and Hameg uses it in some of there other products.

Ed


Re: Just as modern as the day it came out

stefan_trethan
 

Beer goggles?

ST

On Mon, Jun 11, 2018 at 12:22 AM, Pete Lancashire <xyzzypdx@gmail.com> wrote:
I got to thinking today, how a 7603, 7A18, 7B53A etc looks as modern and
'cool' as it did the day it came on the marked.

Same will all of 7K

-pete Proud of having been there for a few of my years



Re: OT: AT5005 spectrum analyzer display

Ed Breya
 

Thanks Tony. Also, regarding your question about the CRT ID, I had the unit opened up for a while to try tweaking the settings and see the basic layout, and look for any obvious faults - none found. But, I put it back together already. Next time I open it I will look at the CRT closely. It's possible it's indicated in the HM5010 service manual. I don't recall that it had a parts list, but some of the part types are shown on the schematics - maybe the CRT too.

Ed


Re: Off Topic: Wanted Spectracom 8212 Chart Recorder Manual

Ed Breya
 

Dennis, remember the TM500 has AC power available inside by virtue of the floating LV AC windings - two per slot, so two slots could give four windings at 24V-30V (I forget the specs) each that could add up to around 110-120V (especially if that's the only load) - probably close enough. Or, a single winding through a small step-up transformer could do it to. I presume the chart paper drive is one of those old-school synchronous clock motors with built-in gearbox to get whatever speed is needed. Those only take about 3W, as I recall.

Ed


Re: OT: AT5005 spectrum analyzer display

 

Attached operation manual , there are block diagram only , I do not have the service manual , hope it help .
Rd Tony

From: Yiu On Tony C via Groups.Io <tonycheung_hk=yahoo.com@groups.io>
To: TekScopes@groups.io
Sent: Monday, June 11, 2018 7:42 AM
Subject: Re: [TekScopes] OT: AT5005 spectrum analyzer display

Can you see the CRT part number ?

從我的 iPhone 傳送

Ed Breya via Groups.Io <edbreya=yahoo.com@groups.io> 於 2018年6月11日 上午12:58 寫道:

I picked up this 500 MHz SA for cheap, because the CRT display is very dim, although it appears to work otherwise. I was hoping that some internal adjustments would fix it right up, but no. The unit is labelled Atten Instruments, model AT5005, and appears to be a Chines knockoff of the Hameg HM5005 - or maybe they're all made in China anyway. I couldn't find a manual for it, but did find the one for Hameg 5010, which includes schematics and more. It looks like the basic units are the same, especially the PS and CRT circuits, so I have what I need to check it out eventually. This is low priority, but it could be a handy toy SA for limited field use and such - it's definitely more portable than the good old real SAs I'm used to.

Just wondering if anyone happens to be familiar with this unit and common problems with it, to maybe find a quick fix. I haven't made any of the usual internal checks yet. One thing I noticed is that the focus adjustment needs to be at one extreme for a sharp, but barely visible display. I'm guessing there's something wrong in the CRT HV circuits, rather than the CRT having gone bad - unless that's one of the common problems with these.

Ed



Off Topic: Wanted Spectracom 8212 Chart Recorder Manual

 

I have a set of Spectracom WWV receiver TM500 plugins. I have manuals for
most of them but I am missing the manual for the dual wide 8212 Chart
Recorder.



This recorder uses two slots in a Tek TM5xx or TM5xxx mainframe. It receives
a 0-1mA DC signal from the 8150 Precision Phase Comparator Aux Output front
panel jack or the rear interface connector. It uses MP00025 Chart Paper.



I searched google with no success. I have done google searches over the
years in hopes that a manual might show up also with no success.



The only marking of any kind inside the unit is a little paper label
attached to the motor that that drives the chart paper. It says D-7710
Donaueschingen Stegmann and it lists the voltage the motor works on
3512-250/110V/60Hz. This is somewhat mysterious since the TM mainframes do
not supply 110V on any of their connector pins. and this chart recorder
works in any TM mainframe. I'm not sure how they do that but a manual or
schematic should explain it.



Thanks in advance,

Dennis Tillman W7PF


Re: OT: AT5005 spectrum analyzer display

 

Can you see the CRT part number ?

從我的 iPhone 傳送

Ed Breya via Groups.Io <edbreya=yahoo.com@groups.io> 於 2018年6月11日 上午12:58 寫道:

I picked up this 500 MHz SA for cheap, because the CRT display is very dim, although it appears to work otherwise. I was hoping that some internal adjustments would fix it right up, but no. The unit is labelled Atten Instruments, model AT5005, and appears to be a Chines knockoff of the Hameg HM5005 - or maybe they're all made in China anyway. I couldn't find a manual for it, but did find the one for Hameg 5010, which includes schematics and more. It looks like the basic units are the same, especially the PS and CRT circuits, so I have what I need to check it out eventually. This is low priority, but it could be a handy toy SA for limited field use and such - it's definitely more portable than the good old real SAs I'm used to.

Just wondering if anyone happens to be familiar with this unit and common problems with it, to maybe find a quick fix. I haven't made any of the usual internal checks yet. One thing I noticed is that the focus adjustment needs to be at one extreme for a sharp, but barely visible display. I'm guessing there's something wrong in the CRT HV circuits, rather than the CRT having gone bad - unless that's one of the common problems with these.

Ed



Re: 575 - advice sought from owners

David Holland
 

Holy Formatting Failure Batman...... :-(

I uploaded the original spreadsheet here:

https://groups.io/g/TekScopes/files/Tektronix%20575%20Parts


On Sun, Jun 10, 2018 at 6:43 PM, David Holland
<david.w.holland@gmail.com> wrote:
For the PTM caps, in general, I used Mallory 630V polyester film caps
from from Mouser.. I restuffed the electrolytic cans.

I *think* this is the parts list I used when I restored the
non-Mod122... If anyone uses it, please double check the parts, I
sometimes make last minute substitutions, that may not have made it
back into the spreadsheet.

(Yes, I shot-gunned all EMC, and PTM capacitors and one cap I thought
might of been a Micamold (paper) cap.)

Identifier Capacitance Type Voltage Tolerance Part #
C102 .047uf PTM 400v 539-150473J630EC
0.66 Mallory Polyester Film Capacitors 630V .047uF 5%
C105 .047uf PTM 400v 539-150473J630EC
0.66 Mallory Polyester Film Capacitors 630V .047uF 5%
C108 .047uf PTM 400v 539-150473J630EC
0.66 Mallory Polyester Film Capacitors 630V .047uF 5%
C122 .047uf PTM 400v 539-150473J630EC
0.66 Mallory Polyester Film Capacitors 630V .047uF 5%

C128 .047uf PTM 400v 539-150473J630EC
0.66 Mallory Polyester Film Capacitors 630V .047uF 5%
C130 .047uf PTM 400v 539-150473J630EC
0.66 Mallory Polyester Film Capacitors 630V .047uF 5%
C145 .0015uf Mica (mold) 500v 10.00% 5982-19-500V1500P
1.86 Cornell Dubilier Mica Capacitors MICA 1500pF
500V 5%

C186 .022uf PTM 400v 539-150223J630DB
0.54 Mallory Polyester Film Capacitors 630V .022uF 5%
C232 .001uf PTM 600v 539-150102K630BB
0.41 Mallory Polyester Film Capacitors 630V .001uF 10%
C240 2000uf EMC 20v 661-EKMGG250ELL222MK
1.32 United Chemi-Con Aluminum Electrolytic Capacitors -
Leaded 25volts 2200uF 12.5X25
C241 2000uf EMC 20v 661-EKMGG250ELL222MK
1.32 United Chemi-Con Aluminum Electrolytic Capacitors -
Leaded 25volts 2200uF 12.5X25

C242 2000uf EMC 20v 661-EKMGG250ELL222MK
1.32 United Chemi-Con Aluminum Electrolytic Capacitors -
Leaded 25volts 2200uF 12.5X25
C243 2000uf EMC 20v 661-EKMGG250ELL222MK
1.32 United Chemi-Con Aluminum Electrolytic Capacitors -
Leaded 25volts 2200uF 12.5X25
C244 150uf EMC 150v 661-EKXG251ELL151MM2
2.01 United Chemi-Con Aluminum Electrolytic Capacitors -
Leaded 250volts 150uF 18X25
C267 .001uf 600v 539-150102K630BB
0.41 Mallory

C602 2 x 20uf EMC 450v 647-UVY2W220MHD (20uF)
1.14 Nichicon Aluminum Electrolytic Capacitors - Leaded
450volts 22uF 12.5x25 20% 5LS
C611A,B 2 x 20uf EMC 450v 647-UPZ2W390MHD (39uF)
1.48 Nichicon Aluminum Electrolytic Capacitors - Leaded
450volts 39uF 12.5X35.5 20%
C613 .01uf PTM 400v 539-150103K630BB
0.48 Mallory Polyester Film Capacitors 630V .01uF 10%
C620 125uf EMC 350v 647-UPT2G121MHD 2.05
Nichicon Aluminum Electrolytic Capacitors - Leaded 400volts
120uF 16X40 20%

C630 .01uf PTM 400v 539-150103K630BB
0.48 Mallory Polyester Film Capacitors 630V .01uF 10%
C641 2 x 20uf EMC 450v 647-UVY2W220MHD
1.14 Nichicon Aluminum Electrolytic Capacitors - Leaded
450volts 22uF 12.5x25 20% 5LS
C644 .01uf PTM 400v 539-150103K630BB
0.48 Mallory Polyester Film Capacitors 630V .01uF 10%
C655 .01uf PTM 400v 539-150103K630BB
0.48 Mallory Polyester Film Capacitors 630V .01uF 10%
C666 2 x 20uf EMC 450v 647-UVY2W220MHD
1.14 Nichicon Aluminum Electrolytic Capacitors - Leaded
450volts 22uF 12.5x25 20% 5LS

C802 .001uf PTM 600v 539-150102K630BB
0.41 Mallory Polyester Film Capacitors 630V .001uF 10%
C808 .01uf PTM 600v 539-150103K630BB
0.48 Mallory Polyester Film Capacitors 630V .01uF 10%
C809 .001uf PTM 600v 539-150102K630BB
0.41 Mallory Polyester Film Capacitors 630V .001uF 10%

C811 .047uf PTM 600v 10.00% 539-150473J630EC
0.66 Mallory Polyester Film Capacitors 630V .047uF 5%
C816 .022uf PTM 600v 539-150223J630DB
0.54 Mallory Polyester Film Capacitors 630V .022uF 5%


David


On Sun, Jun 10, 2018 at 6:25 PM, tom jobe <tomjobe@gmail.com> wrote:
Hi David,
What type of capacitors do you suggest replacing the 575 paper caps with,
and where do you buy them?
Thank you to all that have contributed to this 575 topic!
tom jobe...

On 6/10/2018 3:17 PM, David Holland wrote:

There are a number of paper capacitors in the HV section. (Amongst other
locations). I'm sure folks will disagree, but I'd recommend preemptively
replacing them. (Any capacitor described as PTM in the parts list is
paper.)

Be careful with C809, if you decide to replace it, its soldered directly
across T801. The wires for the transformer, which will likely come out
with the capacitor, are (very) fine.

David

Obligatory: If anyone wants a non-Mod122C, and is in the Dayton Ohio
area,
and is willing to pick it up, holler. It has been restored, and was
running last I tried it. (No, I will not ship, sorry)

On Sun, Jun 10, 2018 at 5:23 PM, John <John@sykesj.co.uk> wrote:

Thanks for the advice guys: I do normally run stuff up on a variac, and I
will check those fuses are in place. Fortunately I have a supply of
many
of the valves used (and a valve-tester): fingers crossed it's not had all
the valves stripped!

John







Re: 575 - advice sought from owners

David Holland
 

For the PTM caps, in general, I used Mallory 630V polyester film caps
from from Mouser.. I restuffed the electrolytic cans.

I *think* this is the parts list I used when I restored the
non-Mod122... If anyone uses it, please double check the parts, I
sometimes make last minute substitutions, that may not have made it
back into the spreadsheet.

(Yes, I shot-gunned all EMC, and PTM capacitors and one cap I thought
might of been a Micamold (paper) cap.)

Identifier Capacitance Type Voltage Tolerance Part #
C102 .047uf PTM 400v 539-150473J630EC
0.66 Mallory Polyester Film Capacitors 630V .047uF 5%
C105 .047uf PTM 400v 539-150473J630EC
0.66 Mallory Polyester Film Capacitors 630V .047uF 5%
C108 .047uf PTM 400v 539-150473J630EC
0.66 Mallory Polyester Film Capacitors 630V .047uF 5%
C122 .047uf PTM 400v 539-150473J630EC
0.66 Mallory Polyester Film Capacitors 630V .047uF 5%

C128 .047uf PTM 400v 539-150473J630EC
0.66 Mallory Polyester Film Capacitors 630V .047uF 5%
C130 .047uf PTM 400v 539-150473J630EC
0.66 Mallory Polyester Film Capacitors 630V .047uF 5%
C145 .0015uf Mica (mold) 500v 10.00% 5982-19-500V1500P
1.86 Cornell Dubilier Mica Capacitors MICA 1500pF
500V 5%

C186 .022uf PTM 400v 539-150223J630DB
0.54 Mallory Polyester Film Capacitors 630V .022uF 5%
C232 .001uf PTM 600v 539-150102K630BB
0.41 Mallory Polyester Film Capacitors 630V .001uF 10%
C240 2000uf EMC 20v 661-EKMGG250ELL222MK
1.32 United Chemi-Con Aluminum Electrolytic Capacitors -
Leaded 25volts 2200uF 12.5X25
C241 2000uf EMC 20v 661-EKMGG250ELL222MK
1.32 United Chemi-Con Aluminum Electrolytic Capacitors -
Leaded 25volts 2200uF 12.5X25

C242 2000uf EMC 20v 661-EKMGG250ELL222MK
1.32 United Chemi-Con Aluminum Electrolytic Capacitors -
Leaded 25volts 2200uF 12.5X25
C243 2000uf EMC 20v 661-EKMGG250ELL222MK
1.32 United Chemi-Con Aluminum Electrolytic Capacitors -
Leaded 25volts 2200uF 12.5X25
C244 150uf EMC 150v 661-EKXG251ELL151MM2
2.01 United Chemi-Con Aluminum Electrolytic Capacitors -
Leaded 250volts 150uF 18X25
C267 .001uf 600v 539-150102K630BB
0.41 Mallory

C602 2 x 20uf EMC 450v 647-UVY2W220MHD (20uF)
1.14 Nichicon Aluminum Electrolytic Capacitors - Leaded
450volts 22uF 12.5x25 20% 5LS
C611A,B 2 x 20uf EMC 450v 647-UPZ2W390MHD (39uF)
1.48 Nichicon Aluminum Electrolytic Capacitors - Leaded
450volts 39uF 12.5X35.5 20%
C613 .01uf PTM 400v 539-150103K630BB
0.48 Mallory Polyester Film Capacitors 630V .01uF 10%
C620 125uf EMC 350v 647-UPT2G121MHD 2.05
Nichicon Aluminum Electrolytic Capacitors - Leaded 400volts
120uF 16X40 20%

C630 .01uf PTM 400v 539-150103K630BB
0.48 Mallory Polyester Film Capacitors 630V .01uF 10%
C641 2 x 20uf EMC 450v 647-UVY2W220MHD
1.14 Nichicon Aluminum Electrolytic Capacitors - Leaded
450volts 22uF 12.5x25 20% 5LS
C644 .01uf PTM 400v 539-150103K630BB
0.48 Mallory Polyester Film Capacitors 630V .01uF 10%
C655 .01uf PTM 400v 539-150103K630BB
0.48 Mallory Polyester Film Capacitors 630V .01uF 10%
C666 2 x 20uf EMC 450v 647-UVY2W220MHD
1.14 Nichicon Aluminum Electrolytic Capacitors - Leaded
450volts 22uF 12.5x25 20% 5LS

C802 .001uf PTM 600v 539-150102K630BB
0.41 Mallory Polyester Film Capacitors 630V .001uF 10%
C808 .01uf PTM 600v 539-150103K630BB
0.48 Mallory Polyester Film Capacitors 630V .01uF 10%
C809 .001uf PTM 600v 539-150102K630BB
0.41 Mallory Polyester Film Capacitors 630V .001uF 10%

C811 .047uf PTM 600v 10.00% 539-150473J630EC
0.66 Mallory Polyester Film Capacitors 630V .047uF 5%
C816 .022uf PTM 600v 539-150223J630DB
0.54 Mallory Polyester Film Capacitors 630V .022uF 5%


David

On Sun, Jun 10, 2018 at 6:25 PM, tom jobe <tomjobe@gmail.com> wrote:
Hi David,
What type of capacitors do you suggest replacing the 575 paper caps with,
and where do you buy them?
Thank you to all that have contributed to this 575 topic!
tom jobe...

On 6/10/2018 3:17 PM, David Holland wrote:

There are a number of paper capacitors in the HV section. (Amongst other
locations). I'm sure folks will disagree, but I'd recommend preemptively
replacing them. (Any capacitor described as PTM in the parts list is
paper.)

Be careful with C809, if you decide to replace it, its soldered directly
across T801. The wires for the transformer, which will likely come out
with the capacitor, are (very) fine.

David

Obligatory: If anyone wants a non-Mod122C, and is in the Dayton Ohio
area,
and is willing to pick it up, holler. It has been restored, and was
running last I tried it. (No, I will not ship, sorry)

On Sun, Jun 10, 2018 at 5:23 PM, John <John@sykesj.co.uk> wrote:

Thanks for the advice guys: I do normally run stuff up on a variac, and I
will check those fuses are in place. Fortunately I have a supply of
many
of the valves used (and a valve-tester): fingers crossed it's not had all
the valves stripped!

John






Re: 575 - advice sought from owners

tom jobe <tomjobe@...>
 

Hi David,
What type of capacitors do you suggest replacing the 575 paper caps with, and where do you buy them?
Thank you to all that have contributed to this 575 topic!
tom jobe...

On 6/10/2018 3:17 PM, David Holland wrote:
There are a number of paper capacitors in the HV section. (Amongst other
locations). I'm sure folks will disagree, but I'd recommend preemptively
replacing them. (Any capacitor described as PTM in the parts list is
paper.)

Be careful with C809, if you decide to replace it, its soldered directly
across T801. The wires for the transformer, which will likely come out
with the capacitor, are (very) fine.

David

Obligatory: If anyone wants a non-Mod122C, and is in the Dayton Ohio area,
and is willing to pick it up, holler. It has been restored, and was
running last I tried it. (No, I will not ship, sorry)

On Sun, Jun 10, 2018 at 5:23 PM, John <John@sykesj.co.uk> wrote:

Thanks for the advice guys: I do normally run stuff up on a variac, and I
will check those fuses are in place. Fortunately I have a supply of many
of the valves used (and a valve-tester): fingers crossed it's not had all
the valves stripped!

John




Just as modern as the day it came out

Pete Lancashire
 

I got to thinking today, how a 7603, 7A18, 7B53A etc looks as modern and
'cool' as it did the day it came on the marked.

Same will all of 7K

-pete Proud of having been there for a few of my years


Re: 575 - advice sought from owners

David Holland
 

There are a number of paper capacitors in the HV section. (Amongst other
locations). I'm sure folks will disagree, but I'd recommend preemptively
replacing them. (Any capacitor described as PTM in the parts list is
paper.)

Be careful with C809, if you decide to replace it, its soldered directly
across T801. The wires for the transformer, which will likely come out
with the capacitor, are (very) fine.

David

Obligatory: If anyone wants a non-Mod122C, and is in the Dayton Ohio area,
and is willing to pick it up, holler. It has been restored, and was
running last I tried it. (No, I will not ship, sorry)

On Sun, Jun 10, 2018 at 5:23 PM, John <John@sykesj.co.uk> wrote:

Thanks for the advice guys: I do normally run stuff up on a variac, and I
will check those fuses are in place. Fortunately I have a supply of many
of the valves used (and a valve-tester): fingers crossed it's not had all
the valves stripped!

John




Re: Up to date capacitor list for Tek 2465A and 2465B scopes (2018)

 

Im happy to help.  Posting it caused me to verify several points in my list.  Let me know if you find more.  The most glaring problem I found was substituting some Nichicon for Panasonic and not changing the "Type" column.

On ‎Sunday‎, ‎June‎ ‎10‎, ‎2018‎ ‎03‎:‎26‎:‎36‎ ‎PM‎ ‎CDT, Timothy via Groups.Io <mustang_gt_y2k=yahoo.com@groups.io> wrote:

On Sun, Jun 10, 2018 at 09:57 am, machineguy59 wrote:


I believe you are asking for this:
https://groups.io/g/TekScopes/files/Caps%20list%20updated%20March%202018.xlsx
Thank you, You deserve a medal!


Re: 575 - advice sought from owners

John
 

Thanks for the advice guys: I do normally run stuff up on a variac, and I will check those fuses are in place. Fortunately I have a supply of many of the valves used (and a valve-tester): fingers crossed it's not had all the valves stripped!

John


Re: Help needed with no trace no beamfinder on 465 (not b)

 

Replacing the fuse with an ammeter I read 120mA.

39621 - 39640 of 188254