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Re: 8640B External Reference
I see your reputation for off-handed comments is well deserved. Too bad you have no clue what you are talking about and I don't wish to explain it to you. 73, Dick, W1KSZ/7
By Richard W. Solomon <w1ksz@...> · #9221 ·
Re: Anyone know if these movies still exist
I am in Florida. For those in Au or the like with PAL, I could (I think) make PAL DVD's or just make the files available by DVD, if they're not too large. Harvey
By Harvey White <madyn@...> · #9220 ·
Re: Anyone know if these movies still exist
They made movies? Wow Uber geeks!! I'd love to see them - I could xfer to dvd - but Australia is a long way to ship such precious tapes. Harvey White wrote:
By swingbyte <swingbyte@...> · #9219 ·
Re: 8640B External Reference
The 8640B external reference can be configured to accept a 1MHz input, but the jumpers are deeply buried in the time-base module on A8A3. It is not necessary for the reference to be a sinusoid. It is
By k1ggi <k1ggi@...> · #9218 ·
Re: YIG cross-reference
the first digits filled up with 0s usually lead to the unit, for example 08360-xxxx is from a 8360 series Geraldo Lino de Campos <geraldo@...> wrote: Usually there are HP YIG
By lothar baier <microwaveengineer1968@...> · #9217 ·
Re: 8640B External Reference
http://tonnesoftware.com/ i own a copy of his meter software the filter software is free for the limited versions which is all i ever used for my projects. and are very
By arthurok · #9216 ·
YIG cross-reference
Usually there are HP YIG oscillators or filters at reasonable prices on EBAY, sometimes identified by the board number. It will be very interesting to know the instrument they fitted, to be able to
By glic1234 · #9215 ·
Re: 8640B External Reference
a flip flop and simple low pass if needed is too much for an extra class ham to build up??
By arthurok · #9214 ·
Re: 8640B External Reference
a flip flop with a low pass filter should work quite well at generating a nice sine wave go to tonne software and download his free filter design software you can
By arthurok · #9213 ·
Re: 8640B External Reference
So basically what you are telling me is that it is not worth the effort to try and supply an external reference to the 8640B, yes ?? I have two TrueTime XL-AK GPS Receivers that have 5 outputs on the
By Richard W. Solomon <w1ksz@...> · #9212 ·
Re: HP-5245L Plug-Ins
By Dave Brown <tractorb@...> · #9211 ·
Re: 8640B External Reference
One thing need to be made clear however, the external timebase will not affect the frequency stability in normal operating mode since it is only used for the frequency counter, if you push the
By lothar baier <microwaveengineer1968@...> · #9210 ·
Re: Anyone know if these movies still exist
The prints I received were VHS, not on film. I don't know if anyone at Tek even cares after the sellout. Also NTSC is largely going away in a year. -John pdxoregonpete wrote:
By J Forster <jfor@...> · #9206 ·
Re: Anyone know if these movies still exist
I'd be willing to transfer them to DVD... Harvey
By Harvey White <madyn@...> · #9209 ·
Re: 8640B External Reference
as he says a low pass filter will produce a quasi sine wave "gaussian responce"
By arthurok · #9208 ·
Re: 8640B External Reference
sorry i wasnt to clear on that, the DDS i was refering to actually has a clock multiplier build in that allow a max of 30MHz i think. Mike Feher <n4fs@...> wrote: If you use 10 MHz as
By lothar baier <microwaveengineer1968@...> · #9207 ·
8140T reference tap
Sorry, guys, I did not mean for that to go to the reflector. regard,s Tom
By Tom Dawson · #9205 ·
Re: Anyone know if these movies still exist
They should at least be preserved, the Tek ones I remember went back to the 50's and 60's and where 16MM.
By pdxoregonpete <pdxoregonpete@...> · #9204 ·
Re: Anyone know if these movies still exist
pdxoregonpete wrote: About 10 years ago, I got a box of Tek VHS videos on NTSC video measurements, etc. They might still be available, if wanted. Is it worth checking? -John
By J Forster <jfor@...> · #9202 ·
Re: 8640B External Reference
If you use 10 MHz as a clock for a DDS, then, you are just as well off using a flip-flop. Your output will be just a 5 MHz square wave either way. Now if you were to multiply the 10 MHz up first, like
By Mike Feher · #9203 ·