Re: Hughes IMPATT
¿ªÔÆÌåÓýHi Ed ? Thank you for your input? I am familiar with the older version that you provided a link to and the more modern version that includes a lineariser to try to straighten out the not ?linear frequency response of the IMPATT A lot of people think that the oscillator is within the sweeper as it has the frequency display not so it is an external wave guide unit usually on a 3 leg stand? the Hughes catalog is in the Files on this sight as I put it their ? So I am still looking for more Hughes hardware and in depth knowledge? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of ed breya ? I recall seeing some HP8620 plug-ins over the years, that were labeled as Hughes, but none contained an oscillator as far as I could see. They had connectors on the front for control/drive cables that went to various external waveguide-mounted oscillators, which were presumably separated from the plug-ins and long gone. ? A quick look online for "hp8620 hughes" showed an example on ebay: ? ? I don't know who actually built them but they look like sort of commercial, low volume custom units, including the plug-in and the scale. I've never knowingly seen any of the oscillators. You can see on the back of the plug-in a line power in and out, which probably ran the power supply for the oscillator via the RF ON/OFF switch. You can also see that they were built from parts or sacrificed plug-ins, not custom made by HP - they would have looked much nicer if so. ? Ed ? ? |
Paul Bicknell