HP thingamabobs
anonymous
November 30 2015, 21:36:58 UTC
They're a chip hybrid used mainly in the '70's cable industry for cable-mounted trunk and distribution amplifiers.
Excellent performance from 40-330 MHz (+/- 1dB from linear slope over that range) with really low cross modulation and second-order intermodulation products (-89 and -80 dB respectively).
Re: HP thingamabobsjeff_duntemannDecember 1 2015, 23:04:29 UTC
So they're broadband power amps, then? (Else why the TO-36 case?) Any idea how much power they can push? I'd love to lay hands on a data sheet, if you ever run across one. My searches have so far been in vain.
If I knew the pinout I could just lash one up and see if a little 6M signal in would result in a larger 6M signal out. Even a watt or two would be useful.
Re: HP thingamabobs
anonymous
December 3 2015, 03:04:03 UTC
That'll be kinda difficult. I only remember one place they were ever used and that was in the Anaconda CATV 'Century' Amplifier - and Anaconda moved on to the TRW hybrids (as did pretty much everyone else) because HP had made insufficient allowance for heat dissipation in the package.
The odds are that you got those at some point because HP's development lab was in Colorado Springs back then. Might be some old docs kicking around in hard-copy at the CATV Museum ...
Comments 4
They're a chip hybrid used mainly in the '70's cable industry for cable-mounted trunk and distribution amplifiers.
Excellent performance from 40-330 MHz (+/- 1dB from linear slope over that range) with really low cross modulation and second-order intermodulation products (-89 and -80 dB respectively).
About $50 in the day ... :-)
Reply
If I knew the pinout I could just lash one up and see if a little 6M signal in would result in a larger 6M signal out. Even a watt or two would be useful.
Reply
That'll be kinda difficult. I only remember one place they were ever used and that was in the Anaconda CATV 'Century' Amplifier - and Anaconda moved on to the TRW hybrids (as did pretty much everyone else) because HP had made insufficient allowance for heat dissipation in the package.
The odds are that you got those at some point because HP's development lab was in Colorado Springs back then. Might be some old docs kicking around in hard-copy at the CATV Museum ...
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