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7603 capacitors
Thanks all for the discussion. I have ordered new caps as well as an ESR meter. I expect the new caps will help, but am also curious as to the condition of the old ones. By the way, the comment about
By Robert Simpson · #34866 ·
Re: 7603 filter caps
---- Bernice Loui <rupunzels_window@...> wrote:
By Bert Haskins · #34865 ·
Probe Tips
I need a couple of spring hook tips for a P6109 probe. Does anyone have any to spare? David KC2JD/4
By David C. Hallam <dhallam@...> · #34864 ·
Re: Calibrating a 7704A
The 067-0587-02 (or -10) version is good far ANY 7000 series 'scope. The -10 version is also good for 113xx and 114xx 'scopes as well (I think). Dave
By David C. Partridge <david.partridge@...> · #34863 ·
Re: 7603 filter caps
Hello, It's also dependent on frequency.. If the 'lytic cap in question is used in a good old fashioned line frequency copper/iron power transformer, the ESR requirement is not very high since ripple
By Bernice Loui <rupunzels_window@...> · #34862 ·
Re: Calibrating a 7704A
Ok, I'm starting to understand a bit better. I'm in the processor of repairing the scope and have been trying to be careful to not turn pots that don't need it. But I'm getting to the point where the
By Neil Gruending · #34861 ·
DM44
Can anyone explain to me EXACTLY what a DM44 does? I assume it takes voltage measurements, but does it take it from the scope? It's own probes? Can anyone talk me into/out of getting a 465 with one
By Jordan Kersten <jordankersten@...> · #34860 ·
Re: 7603 filter caps
Primary use for a ESR meter for me is testing all caps in a circuit because frequently I purchase a piece of equipment which has been out of service for a LONG time and the electrolytics in many cases
By Scott McGrath <mcgrath@...> · #34859 ·
Re: 7603 filter caps
The ESR is critical to ripple.
By Jerry Massengale <jmassen418@...> · #34858 ·
Re: Tek DM44
Ignacio, I believe that if you ask AA4DF, he will let you share the lower resolution scan of his manuals. I have bought the Tek 494P manual a year or 2 ago, and he let me post the low res version
By Didier Juges <didier@...> · #34857 ·
Re: Tek DM44
Jordan, I found the origin of this manual. I bought it from AA4DF site . Since they carefully scanned and sell this hi quality manual (I paid $10 but I think now it is just $4.99), I think it is no
By EB4APL <eb4apl@...> · #34856 ·
Re: Tek DM44
Jordan, I have the service manual in pdf. It???s about 12 Mb. It is a hi quality scan that I downloaded some time ago, I don???t rememeber the source so I can???t give them the due credit,
By EB4APL <eb4apl@...> · #34855 ·
Re: 067-0587-02 (was Calibrating a 7704A)
d.seiter@... escribi???: Mmmm... let me see... yes, the exoticc elastomeric switch! Well, it has also quite a lot of exotic hybrids :) Regards, Javier --
By fjh001 · #34854 ·
Re: 067-0587-02 (was Calibrating a 7704A)
One of my two was DOA through this. Inside the switch ("do not open" says the manual. Ha!), the cunningly shaped elastomer had a tear in it, and was failing to operate two of the contacts. A bit of
By Craig Sawyers <c.sawyers@...> · #34853 ·
Re: 7603 filter caps
Deane is quite right. Think about it this way - when the bridge diode turns on, the capacitor charges up through the secondary resistance of the power transformer and the reflected primary resistance,
By Craig Sawyers <c.sawyers@...> · #34852 ·
Re: 7603 filter caps
I wouldn't say that the ESR meter is "required", but it sure makes life easier! Plus, it's a cool kit to build (if you happen to go that route...;-)) -Dave
By d.seiter@... · #34851 ·
067-0587-02 (was Calibrating a 7704A)
I decided to pull out my 067-0587-0x's and realized that I'd never tried the -02. Of course, I find it has problems, like the gain steps aren't there. I only have the manual for the -02, but I assume
By d.seiter@... · #34850 ·
Re: 7603 filter caps
That may be so, but when repairing relatively modern equipment with many many caps that need to have low ESR for the circuit to work (e.g. switching voltage converters) it is absolutely great to be
By Stefan Trethan <stefan_trethan@...> · #34849 ·
Re: Calibrating a 7704A
This reminds me that I need to do a "group cal" on all my gear. I have both fixtures, but I just never get around to it. The individual scopes are all cal'd, but when I start swapping plugins, I
By d.seiter@... · #34847 ·
Tek DM44
Anyone got a manual for a DM44? Owners and/or service. ~Jordan~
By Jordan Kersten <jordankersten@...> · #34846 ·