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Re: HP8562A

 

Siliconix DMOS FET's were used for high level (+27) mixers
in HF receivers.? Racal 6790, 6830 etc.? 4 were used in a
commutating ring setup driven by an amp driven to 1dBc to
get a flat top on the 70 MHz sine wave.
Siliconix did a good white paper on the application.

Tektronix used DMOD in the front ends of some TM500/5000
counters, DC509 etc.
JimMc

On Wednesday, September 4, 2019, 5:43:03 PM PDT, Peter Gottlieb <hpnpilot@...> wrote:


I have a bunch of SD211DE and some SD214DE. I wonder what both of those are used in/for.


Peter

> On Sep 4, 2019, at 6:56 PM, Paul Amaranth <paul@...> wrote:
>
> That crosses to an SD215.? Future Electronics has 131 of those in stock at
> a little over $5 apiece.
>
> If you haven't found it already, there's an HP/JDEC reference available.
> Sphere has one:
>?
>
> That's pretty useful.
>
>> On Wed, Sep 04, 2019 at 01:18:46PM -0700, pa0vtw@... wrote:
>> I'm looking for 2 mosfets, Q204 and Q206 for my spectrum analyzer or is there anybody who knows a replacement for them.
>>
>> The mosfets are on the A2 board of the analyzer.
>>
>> HP part number: 1855-0241 transistor mosfet n-chan. Emode TO72SI
>>
>> Thanks in advance.
>>
>>
>>
>>
>>
>> !DSPAM:5d7029f9244012026219676!
>
> --
> Paul Amaranth, GCIH? ? ? ? ? ? | Manchester MI, USA
> Aurora Group of Michigan, LLC? |? Security, Systems & Software
> paul@...? ? ? ? ? ? ? |? Unix & Windows? ? ? ? ? ? ?
>
>
>


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