UK Vintage Radio Repair and Restoration Powered By Google Custom Search Vintage Radio and TV Service Data

Go Back   UK Vintage Radio Repair and Restoration Discussion Forum > Offered and Wanted Messages > Sets, Parts and Service Information Wanted (private buyers only, no swaps)

Notices

Sets, Parts and Service Information Wanted (private buyers only, no swaps) If you need help obtaining components, sets or equipment, post a message here. Private buyers only - no traders. No swaps.

Reply
 
Thread Tools
Old 2nd Dec 2021, 12:19 am   #1
MeerKat
Pentode
 
MeerKat's Avatar
 
Join Date: Jan 2016
Location: Ramsgate, Kent, UK.
Posts: 245
Default Surge protector/spark gap for a Fluke meter please

Hi All,

Itís out of a Fluke 23 multimeter, there are two as you can see from the photos. I have searched online but can't find one.

Has anybody one of these to spare?

All reasonable costs paid of course.

Many thanks,
Attached Thumbnails
Click image for larger version

Name:	3.jpg
Views:	135
Size:	96.8 KB
ID:	247102   Click image for larger version

Name:	protect.jpg
Views:	111
Size:	35.5 KB
ID:	247103  
__________________
Andrew

Illegitimi non carborundum
MeerKat is offline   Reply With Quote
Old 2nd Dec 2021, 7:18 am   #2
Craig Sawyers
Dekatron
 
Craig Sawyers's Avatar
 
Join Date: Nov 2010
Location: Oxford, UK.
Posts: 3,595
Default Re: Surge protector/spark gap for a Fluke meter please

The fusible resistor seems to have a crack.

Source of bits is Fluke. Don't expect them to be cheap. Try the UK service centre:

Fluke Precision Measurements
Customer Support
52, Hurricane Way
Norwich
Norfolk NR6 6JB
United Kingdom
+44-0-1603256620
+44-0-1603256777 (telefax)
service.uk@fluke.com
__________________
Doomed for a certain term to walk the night
Craig Sawyers is offline   Reply With Quote
Old 2nd Dec 2021, 8:42 am   #3
dazzlevision
Nonode
 
Join Date: Sep 2003
Location: Near Swindon, North Wiltshire, UK.
Posts: 2,992
Default Re: Surge protector/spark gap for a Fluke meter please

It's a spark gap, isn't it? As used in colour CRT TVs to protect against CRT inter electrode flashovers.

MDC = MAIDA DEVELOPMENT CO.

https://www.maida.com/index.php

Similar devices made by Vishay: https://www.vishay.com/docs/28521/gapkap.pdf
dazzlevision is offline   Reply With Quote
Old 2nd Dec 2021, 8:57 am   #4
HamishBoxer
Dekatron
 
HamishBoxer's Avatar
 
Join Date: Aug 2007
Location: W.Butterwick, near Doncaster UK.
Posts: 8,231
Default Re: Surge protector/spark gap for a Fluke meter please

Yes those spark gaps were on crt bases on colour sets.
__________________
G8JET BVWS Archivist and Member V.M.A.R.S
HamishBoxer is offline   Reply With Quote
Old 2nd Dec 2021, 9:08 am   #5
Pamphonica
Nonode
 
Pamphonica's Avatar
 
Join Date: Mar 2008
Location: Virginia Water, Surrey, UK.
Posts: 2,328
Default Re: Surge protector/spark gap for a Fluke meter please

BTW I assume that the light brown 1K fusible resistor at the bottom of the photo is to be replaced as well. It has a nice crack! An essential part as nothing works properly if it goes o/c.
__________________
Jeremy, G8MLK, BVWTVM Friend, VMARS, BVWS Secretary.
www.pamphonic.co.uk www.bttt.org.uk
Pamphonica is offline   Reply With Quote
Old 2nd Dec 2021, 9:34 am   #6
G6Tanuki
Dekatron
 
G6Tanuki's Avatar
 
Join Date: Apr 2012
Location: Wiltshire, UK.
Posts: 10,804
Default Re: Surge protector/spark gap for a Fluke meter please

The little yellow voltage limiter is meant to have that slot in the top... No need to replace it.
__________________
"The future's so bright I gotta wear shades". --Timbuk3
G6Tanuki is offline   Reply With Quote
Old 2nd Dec 2021, 9:38 am   #7
Station X
Moderator
 
Station X's Avatar
 
Join Date: Jan 2003
Location: Ipswich, Suffolk, IP4, UK.
Posts: 18,780
Default Re: Surge protector/spark gap for a Fluke meter please

I have limited stocks of a substitute fusible resistor:-

https://www.vintage-radio.net/forum/...d.php?t=127156

When a spark gap in my Fluke went short-circuit I restored operation by working a piece of paper back and forth in the gap.
__________________
Graham. Forum Moderator

Keep the soldering iron hot.
Station X is offline   Reply With Quote
Old 2nd Dec 2021, 3:15 pm   #8
MeerKat
Pentode
 
MeerKat's Avatar
 
Join Date: Jan 2016
Location: Ramsgate, Kent, UK.
Posts: 245
Default Re: Surge protector/spark gap for a Fluke meter please

Many thanks for all your replies.

I must admit I had missed that cracked resistor, I blame my eyesight!

I will PM you Graham re the resistors. I tried the paper trick but it didn't work for me.

Mouser do vishay Gapkaps but delivery is £12 and there is nothing else I need at the mo, I'll see what Fluke UK charge.
__________________
Andrew

Illegitimi non carborundum
MeerKat is offline   Reply With Quote
Old 3rd Dec 2021, 7:15 am   #9
Diabolical Artificer
Dekatron
 
Diabolical Artificer's Avatar
 
Join Date: Jul 2009
Location: Sleaford, Lincs. UK.
Posts: 6,364
Default Re: Surge protector/spark gap for a Fluke meter please

I'll have a look in my MOV/odds&sods draw, Andy.
__________________
Curiosity hasn't killed this cat...so far.
Diabolical Artificer is offline   Reply With Quote
Old 3rd Dec 2021, 6:44 pm   #10
MeerKat
Pentode
 
MeerKat's Avatar
 
Join Date: Jan 2016
Location: Ramsgate, Kent, UK.
Posts: 245
Default Re: Surge protector/spark gap for a Fluke meter please

Many thanks Andy, as you can see resistors are sorted but nothing from Fluke yet.
__________________
Andrew

Illegitimi non carborundum
MeerKat is offline   Reply With Quote
Old 3rd Dec 2021, 7:04 pm   #11
Pamphonica
Nonode
 
Pamphonica's Avatar
 
Join Date: Mar 2008
Location: Virginia Water, Surrey, UK.
Posts: 2,328
Default Re: Surge protector/spark gap for a Fluke meter please

Try IPA on the paper perhaps, on that spark gap. If it’s had a bad incident there could be quite a lot of carbon inside that crack. Or desolder it temporarily to remove it as a possible fault cause?
__________________
Jeremy, G8MLK, BVWTVM Friend, VMARS, BVWS Secretary.
www.pamphonic.co.uk www.bttt.org.uk
Pamphonica is offline   Reply With Quote
Old 3rd Dec 2021, 7:04 pm   #12
Diabolical Artificer
Dekatron
 
Diabolical Artificer's Avatar
 
Join Date: Jul 2009
Location: Sleaford, Lincs. UK.
Posts: 6,364
Default Re: Surge protector/spark gap for a Fluke meter please

Looked Andrew, sorry, all I have are MOV's, no sparks gaps of those type.

As Jeremy says try thin card with IPA/switch cleaner impregnated. Failing that as it's a KO'd anyway, remove it, but be very careful, at least you'll be able to use your meter in the short term.

Andy.
__________________
Curiosity hasn't killed this cat...so far.

Last edited by Diabolical Artificer; 3rd Dec 2021 at 7:10 pm.
Diabolical Artificer is offline   Reply With Quote
Old 3rd Dec 2021, 10:47 pm   #13
MeerKat
Pentode
 
MeerKat's Avatar
 
Join Date: Jan 2016
Location: Ramsgate, Kent, UK.
Posts: 245
Default Re: Surge protector/spark gap for a Fluke meter please

Thanks for looking Andy.

I'll try IPA Jeremy, I will find a bit of card/paper that is a snug fit, hopefully that will do a better job of cleaning the slot out.

I'll try in the next day or so.
__________________
Andrew

Illegitimi non carborundum
MeerKat is offline   Reply With Quote
Old 15th Dec 2021, 12:02 am   #14
MeerKat
Pentode
 
MeerKat's Avatar
 
Join Date: Jan 2016
Location: Ramsgate, Kent, UK.
Posts: 245
Default Re: Surge protector/spark gap for a Fluke meter please

I have fitted the resistor I purchased from Graham and I have cleaned the spark gap out with IPA. I tried some high DC volts via a 1 meg resistor but was getting strange varying readings after 500v so I'll remove it and get some from Mouser soon.

Never heard a dicky bird from Fluke and I know they received the email.
__________________
Andrew

Illegitimi non carborundum
MeerKat is offline   Reply With Quote
Old 15th Dec 2021, 6:56 am   #15
Craig Sawyers
Dekatron
 
Craig Sawyers's Avatar
 
Join Date: Nov 2010
Location: Oxford, UK.
Posts: 3,595
Default Re: Surge protector/spark gap for a Fluke meter please

Sad you've heard nowt from Fluke. It is quite a while since I ordered anything from them, or sought advice, but I recall them being pretty good.

Craig
__________________
Doomed for a certain term to walk the night
Craig Sawyers is offline   Reply With Quote
Reply

Thread Tools



All times are GMT. The time now is 5:40 am.


All information and advice on this forum is subject to the WARNING AND DISCLAIMER located at https://www.vintage-radio.net/rules.html.
Failure to heed this warning may result in death or serious injury to yourself and/or others.


Powered by vBulletin®
Copyright ©2000 - 2022, vBulletin Solutions, Inc.
Copyright ©2002 - 2021, Paul Stenning.