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Re: Tek 2465b two probes showing slightly different voltages and phases
There is likely not a problem at all. Firstly, the scope is only good to what, 5%? to 2%, look at the specs. Secondly, probe calibration (in terms of HF compensation) is anything but an exact
By Harvey White · #175600 ·
Fun with the type S plugin
Hi everyone, About 20 years ago I needed to replace a step recovery diode in a piece of (non Tek) equipment. I had to test an assortment of diodes for this function and managed to achieve it with a
By Morris Odell · #175599 ·
Re: Tek 2465b two probes showing slightly different voltages and phases
Since you didn't provide any actual numbers, it's difficult to say anything specific. Generally speaking, though, you shouldn't expect two different types of probes to be exquisitely phase matched --
By Tom Lee · #175598 ·
Re: Rotation direction of fan in 2465
Well as it happens while I've succesfully rewound one of these motors before, but this time after rewinding and reassmbly I must have caught one of the hall effect sensors on the case of the motor and
By alan.bain@... · #175597 ·
Tek 2465b two probes showing slightly different voltages and phases
Newbie here with a Tek2465b and multiple 10:1 probes, none the same. (but they have been "compensated using the builtin calibrator of the 2465b). I a am feeding two channels simultaneously from the
By Mark Hatch <mark2382@...> · #175596 ·
Re: Firmware for Tektronix 492/496 spectrum analyzer
I got an adapter for using a 27c256 to replace the 4 8K ROMs. I¡¯ll see how this work (when the other parts arrive). I¡¯m now skeptical that the processor is the problem but I¡¯ll work to get the
By vk2bea · #175595 ·
Re: Rotation direction of fan in 2465
?ann mi?., 30. des. 2020 kl. 17:53 skrifa?i Chuck Harris <cfharris@... Hey Chuck, Unfortunately that doesn¡¯t help OP, as an impeller will pull the same way whichever direction the motor
By Sigur?ur ?sgeirsson · #175594 ·
Re: 7904A restoration questions
Dave, I have a dozen or so older 4xx, 5xxxx and 7xxx series scopes and considering how many capacitors are contained within those dozen or more of scopes, I can say that I have seen very few really
By Michael W. Lynch · #175593 ·
Re: 7904A restoration questions
I agree, except in the case of some TDS 420's TDS 640's etc. the bypass caps are just all bad.
By ted moss · #175592 ·
Re: 7904A restoration questions
If David reads this he should know that you (David C. Partridge) and Tom Lee know what you are talking about and your advice is precisely what I told him as soon as I approved his post. I told him
By Dennis Tillman W7pF · #175591 ·
Re: Mechanism of CRT Double Peaking (UPDATED)
Nenad, I have a 5103N that appears to be showing double peaking in its CRT, and I'm willing to try making these measurements. Am I correct in assuming that I can do this with nothing more than a
By Jeff Dutky · #175590 ·
Re: Mechanism of CRT Double Peaking (UPDATED)
Hi Chuck, Yes, I agree we derailed the subject by going deep into the cathode issues, but I still instinctively believe that double peaking explanation may be within grasp (without major research).
By Nenad Filipovic · #175589 ·
Re: Rotation direction of fan in 2465
fan blows out the back of the scope. alan.bain@... wrote:
By Chuck Harris <cfharris@...> · #175588 ·
Rotation direction of fan in 2465
Very silly question but can anyone tell me which way the impeller type fan in a 2465 is mean to rotate; I have rewound mine and realise I don't know this vital piece of information for phasing the
By alan.bain@... · #175587 ·
Re: Spectrum analyzer Tektronix 7L13 on mainframe Tektronix 7603
Hi Attilio No, only the crystal and retune the filter Regards! -----Mensaje original----- De: [email protected] [mailto:[email protected]] En nombre de Attilio Enviado el: mi¨¦rcoles, 30 de
By Miguel Work · #175586 ·
Re: Spectrum analyzer Tektronix 7L13 on mainframe Tektronix 7603
Hi Miguel, thanks, if I understand correctly I have to replace the crystal with a 52.5 MHz one and retune the 2nd band pass filter. Do I need to change other components ? Thanks for the info. --
By Attilio · #175585 ·
Tek Scopes and Modules for New Home
I hope this is the right forum for this message. If not, I apologize and please point me in the right direction. I have been acquiring tek equipment for some years but it's time for me to pass these
By Ken Lemberger · #175584 ·
Re: Rescuing 500s from tube snatchers/scavengers - how much is it worth
I've gotten 100 free listings a month for the last couple of years. Shortly before I decided to get a store they upped it to 200. Vince. -- K8ZW http://www.metalworkingfun.com http://www.hamradio.fun
By Vince Vielhaber · #175583 ·
Re: Rescuing 500s from tube snatchers/scavengers - how much is it worth
Not totally true. Stores cost and they do have hidden fees for listing unless you get free listing privileges.? My 23rd year on eBay and boy, has it changed, from great to reasonably sucky. ?Jeff
By Jeff Kruth · #175582 ·
Re: Spectrum analyzer Tektronix 7L13 on mainframe Tektronix 7603
crystal of 52.5 MHz with 55MHz. tr501 to TR503 TR503 to TR502 501 55MHz to 52.5 http://www.transistorforum.nl/forum/index.php?mode=thread&id=23396 I have a TR502 with 1.8Ghz counter and LEMO cables.
By Miguel Work · #175581 ·