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Re: And the winner is my "new" 7A13! Was: 7K series - Conceptual question - What's the 3rd most useful plugin
Take a look at https://www.youtube.com/watch?v=mjF0S-ctXfg as well - shows a relay test with a scope in X-Y mode. Best Peter
By Peter H · #151241 ·
Re: Concentric A and B time-base knobs/interlocking
Latest info : I have now replaced the timing board with one from the parts-donor. This hasn't solved the problem, so I'm scratching my head again, because the behaviour of the "A INTEN" and "B DLYD"
By Colin Herbert · #151240 ·
Re: And the winner is my "new" 7A13! Was: 7K series - Conceptual question - What's the 3rd most useful plugin
Adding extra caps is certainly unnecessary, and most probably not a good idea. It defeats what you are trying to achieve. The whole purpose behind adding a cap across the relay coil, or adding a
By Chuck Harris <cfharris@...> · #151239 ·
Re: 222 battery circuit
Hi Is 222 or a 222A? -----Mensaje original----- De: [email protected] [mailto:[email protected]] En nombre de Szabolcs Szigeti Enviado el: martes, 25 de septiembre de 2018 19:20 Para:
By Miguel Work · #151238 ·
222 battery circuit
Hi, I have made a battery pack for my 222, but interestingly it does not work. It works fine from external power, but not from battery. Closer inspection showed SMD inductors L309 open with burn
By Szabolcs Szigeti · #151237 ·
Re: And the winner is my "new" 7A13! Was: 7K series - Conceptual question - What's the 3rd most useful plugin
Fabio, I was going to ask if you had checked the filter(blocking) diode across the relay coil and also the filter cap with the diode? Where I used to work we had an older CNC lathe a "Tree" brand with
By v_12eng@... · #151236 ·
Re: And the winner is my "new" 7A13! Was: 7K series - Conceptual question - What's the 3rd most useful plugin
Fabio, It would be nice if we could find a replacement for these, even if an adapter board was needed. I worry about this just about every time I use my 7A13 so I end up using my 7A18 ( with the
By Bert Haskins · #151235 ·
Re: And the winner is my "new" 7A13! Was: 7K series - Conceptual question - What's the 3rd most useful plugin
Thanks Roger, One question... As my Jig is not ready yet... At first glance, I obviously considered using a reverse diode to contain the back-emf of the coil... but in face of your suggestion (to
By Fabio Trevisan · #151234 ·
Re: And the winner is my "new" 7A13! Was: 7K series - Conceptual question - What's the 3rd most useful plugin
Fabio, I built such a relay exerciser to use with the similarly packaged 15V DPDT relays in a 7A11. I just had two LEDs on the NO and NC contacts and it was visually obvious which relays were good,
By Roger Evans · #151233 ·
Re: And the winner is my "new" 7A13! Was: 7K series - Conceptual question - What's the 3rd most useful plugin
Hi Dave, Thanks for the advice. I`m building a small test jig on a breadboard, with a 555, to exercise them and also to characterize their contact settling. I wish to be able to tell, from the
By Fabio Trevisan · #151232 ·
Re: 500 tube scope : what is this compartment on top of fit ?
Well, never say never, I guess, but in the current state of things, the 547 does not appeal much to me. Sure it has more BW and Triggering features with its tunnel diode.. but... features and
By Vince · #151231 ·
Re: Tek Parts and CRT's
Yeah, it does suck. FFS! Wonder if someone should Email them and offer a better deal? www.cwgsy.net/private/mandoline "Error 008472. Horrible bug encountered. $Deity knows what happened."
By Andre de guerin · #151230 ·
Re: 500 tube scope : what is this compartment on top of fit ?
Oh, not the 547?
By Alex · #151229 ·
7603 rack mount scopes for fedex ground plus $30 packing.
These are rack type and have nice folding aluminum handles... photos of two serial numbers attached. The photos have names starting with serial number. they both can show some readout activity,
By John Griessen <john@...> · #151228 ·
Re: And the winner is my "new" 7A13! Was: 7K series - Conceptual question - What's the 3rd most useful plugin
Hello Leon I did check both 15V supplies (which is all that the 7A13 uses for the relays). Both of them spot on plus or minus < 0.05V, with less than 5mV noise / ripple (measures taken directly from
By Fabio Trevisan · #151227 ·
Re: And the winner is my "new" 7A13! Was: 7K series - Conceptual question - What's the 3rd most useful plugin
Check the supply voltage to the relay's for voltage and ripple both cold and warm. Sent from K5JLR
By Leon Robinson · #151226 ·
Re: And the winner is my "new" 7A13! Was: 7K series - Conceptual question - What's the 3rd most useful plugin
Before surgery or replacement, you can exercise them and see if that cleans up the contacts enough. Just buzz the coil with a square wave for a thousand cycles or so, and reinstall. That did the
By Dave Wise · #151225 ·
And the winner is my "new" 7A13! Was: 7K series - Conceptual question - What's the 3rd most useful plugin
Hello Folks, Thank you to all your input on my previous topic about the 3rd most useful plugin. Not only it clearly demonstrated how regarded the 7A13 is among many users, but it also gave me the
By Fabio Trevisan · #151224 ·
Re: 500 tube scope : what is this compartment on top of fit ?
Thanks for all the replies people, I am overwhelmed ! LOL Didn't expect that many replies in just 24H, this list never disappoints ! :-) Too bad that only the 535/545 booklet was scanned, but all
By Vince · #151223 ·
Re: 500 tube scope : what is this compartment on top of fit ?
My 575 has adapters I It, too. No little manual... that would have been fun! Phil, N6OMM
By Phillip Potter <p.potter@...> · #151222 ·