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  • Teledyne GPD462

    From brian@21:1/5 to All on Tue Apr 29 09:52:33 2025
    I saw a paper (https://apps.dtic.mil/sti/pdfs/ADA030178.pdf) , active
    antenna referring to a GPD 462 . - Hybrid amplifier

    Does anyone know what the internal circuitry was?

    Brian
    --
    Brian Howie

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  • From Phil Hobbs@21:1/5 to brian on Tue Apr 29 11:43:23 2025
    brian <[email protected]> wrote:
    I saw a paper (https://apps.dtic.mil/sti/pdfs/ADA030178.pdf) , active
    antenna referring to a GPD 462 . - Hybrid amplifier

    Does anyone know what the internal circuitry was?

    Brian

    That’s one of Avantek’s “low cost” hybrid MIC amplifiers. I used its brother GPD-464 a fair amount back in the 80s. They were cheaper than their very nice GPD-211 iirc.

    AFAICT it’s a vanilla NPN Darlington, like most others of that era.

    I still have the databook someplace, I think.

    Cheers

    Phil Hobbs

    --
    Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC / Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics

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  • From Don@21:1/5 to Phil Hobbs on Tue Apr 29 12:43:17 2025
    Phil Hobbs wrote:
    brian wrote:
    I saw a paper (https://apps.dtic.mil/sti/pdfs/ADA030178.pdf) , active
    antenna referring to a GPD 462 . - Hybrid amplifier

    Does anyone know what the internal circuitry was?

    That’s one of Avantek’s “low cost” hybrid MIC amplifiers. I used its brother GPD-464 a fair amount back in the 80s. They were cheaper than their very nice GPD-211 iirc.

    AFAICT it’s a vanilla NPN Darlington, like most others of that era.

    I still have the databook someplace, I think.

    I think you mean MMIC

    Danke,

    --
    Don, KB7RPU, https://www.qsl.net/kb7rpu
    There was a young lady named Bright Whose speed was far faster than light;
    She set out one day In a relative way And returned on the previous night.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Phil Hobbs@21:1/5 to Don on Tue Apr 29 12:47:03 2025
    Don <[email protected]> wrote:
    Phil Hobbs wrote:
    brian wrote:
    I saw a paper (https://apps.dtic.mil/sti/pdfs/ADA030178.pdf) , active
    antenna referring to a GPD 462 . - Hybrid amplifier

    Does anyone know what the internal circuitry was?

    That’s one of Avantek’s “low cost” hybrid MIC amplifiers. I used its >> brother GPD-464 a fair amount back in the 80s. They were cheaper than their >> very nice GPD-211 iirc.

    AFAICT it’s a vanilla NPN Darlington, like most others of that era.

    I still have the databook someplace, I think.

    I think you mean MMIC

    Danke,


    Nope.

    It’s a hybrid, not monolithic.

    Cheers

    Phil Hobbs
    --
    Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC / Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Don@21:1/5 to Phil Hobbs on Tue Apr 29 13:29:22 2025
    Phil Hobbs wrote:
    Don wrote:
    Phil Hobbs wrote:
    brian wrote:
    I saw a paper (https://apps.dtic.mil/sti/pdfs/ADA030178.pdf) , active
    antenna referring to a GPD 462 . - Hybrid amplifier

    Does anyone know what the internal circuitry was?

    That’s one of Avantek’s “low cost” hybrid MIC amplifiers. I used its
    brother GPD-464 a fair amount back in the 80s. They were cheaper than their >>> very nice GPD-211 iirc.

    AFAICT it’s a vanilla NPN Darlington, like most others of that era.

    I still have the databook someplace, I think.

    I think you mean MMIC

    Nope.

    It’s a hybrid, not monolithic.

    OK, an HMIC it is. Blame the pedanticism on my upcoming Extra exam.

    Danke,

    --
    Don, KB7RPU, https://www.qsl.net/kb7rpu
    There was a young lady named Bright Whose speed was far faster than light;
    She set out one day In a relative way And returned on the previous night.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From john larkin@21:1/5 to pcdhSpamMeSenseless@electrooptical. on Tue Apr 29 08:52:07 2025
    On Tue, 29 Apr 2025 12:47:03 -0000 (UTC), Phil Hobbs <[email protected]> wrote:

    Don <[email protected]> wrote:
    Phil Hobbs wrote:
    brian wrote:
    I saw a paper (https://apps.dtic.mil/sti/pdfs/ADA030178.pdf) , active
    antenna referring to a GPD 462 . - Hybrid amplifier

    Does anyone know what the internal circuitry was?

    That�s one of Avantek�s �low cost� hybrid MIC amplifiers. I used its
    brother GPD-464 a fair amount back in the 80s. They were cheaper than their >>> very nice GPD-211 iirc.

    AFAICT it�s a vanilla NPN Darlington, like most others of that era.

    I still have the databook someplace, I think.

    I think you mean MMIC

    Danke,


    Nope.

    It�s a hybrid, not monolithic.

    Cheers

    Phil Hobbs

    I think of Darlingtons as slow - they usually are - but most MMICs are Darlingtons.

    I like the simple, older parts, the ERA and LEE and GALI ones. The
    more modern self-biasing parts have loopy low-frequency response.

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  • From Phil Hobbs@21:1/5 to brian on Tue Apr 29 15:42:24 2025
    On 2025-04-29 04:52, brian wrote:
    I saw a paper (https://apps.dtic.mil/sti/pdfs/ADA030178.pdf) , active
    antenna referring to a GPD 462 . - Hybrid amplifier

    Does anyone know what the internal circuitry was?

    Brian

    <https://electrooptical.net/www/sed/GPD462datasheet.jpg>

    Cheers

    Phil Hobbs

    --
    Dr Philip C D Hobbs
    Principal Consultant
    ElectroOptical Innovations LLC / Hobbs ElectroOptics
    Optics, Electro-optics, Photonics, Analog Electronics
    Briarcliff Manor NY 10510

    http://electrooptical.net
    http://hobbs-eo.com

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  • From brian@21:1/5 to Phil Hobbs on Tue Apr 29 21:44:59 2025
    In message <[email protected]>,
    Phil Hobbs <[email protected]> writes
    On 2025-04-29 04:52, brian wrote:
    I saw a paper (https://apps.dtic.mil/sti/pdfs/ADA030178.pdf) , active >>antenna referring to a GPD 462 . - Hybrid amplifier
    Does anyone know what the internal circuitry was?
    Brian

    <https://electrooptical.net/www/sed/GPD462datasheet.jpg>

    Cheers

    Phil Hobbs

    Thanks,


    I modelled a sort of lookalike using the Darlington mimic style using a resistive load rather than an inductor and a higher supply voltage ,

    Cheers

    Brian

    --
    Brian Howie

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