[NLRS] Search for MGF1302

[Zack Widup]

Someone told me that the MGF1302, for some reason, was the best device
around to use in a doubler circuit, particularly doubling from 12 to
24 GHz. They supposedly outperform just about everything else for this
purpose as far as power output at the harmonic frequency goes.

Seems odd that the newer devices don't stack up to it as a freq
multiplier, but if that is what testing has borne out, then I'd want
to use them if possible.

73, Zack W9SZ

On 2/4/12, Dr. Gerald N. Johnson <geraldj at weather.net> wrote:
>
>
> Franco Rota's web page
> http://www.rfmicrowave.it/catalogue_file.php?file=C.pdf&action=v&lang=eng&pos=2
> shows some 1302 and suggested replacements. He reommends the MGF4919
> also. Here are some of the collected posts on the 1302. I recall one
> post saying the MGF9302 was the same device in a different package. And
> the original poster pointed out he need long leads to go through the PCB
> board for the source connections. There are a few of each on epay at the
> moment, not necessarily at great prices though. And I'm sure shipping
> and paying in Euro won't be too cheap either. I may have had one that I
> removed from my 10G transverter. It was either biased wrong or nearly
> shorted. Seems like the resistance checks changed after I did them a few
> times so I expect I destroyed it. I know the MGA86576 performs beter
> than the misapplied 1302.
>
> 73, Jerry, K0CQ
>>
>>
>> At 11:21 AM 1/24/2012 -0600, you wrote:
>>> Last September DL3IAE sent me this:
>>>> Jerry,
>>>>
>>>> the GaAsFET marked Ar is an MGF1302. I replaced mine with an MGF4919
>>>> (Ebay 1 EURO) in the 10 GHz transverter. Works perfect, NF sub 1 dB, no
>>>> oscillation.
>>>> I have an old DB6NT type transverter from '91.
>>>>
>>>> http://www.mrs.bt.co.uk/dubus/9101-1.pdf
>>>>
>>>> gl
>>>>
>>>> Daniel
>>>> DL3IAE
>>>
>>> Compare the data sheets for a start, and look to Franco Rota for more
>>> replacement possibilities or even MGF 1302. www.rfmicrowave.it Look in
>>> his catalog section C. My downloaded version shows MGF1302 in quantity.
>>>
>>> Mouser and DigiKey carry modern Avago devices. DigiKey carries RFMD
>>> products also. Look at the NLB-310 for an untuned 50 ohm in and out gain
>>> stage good for 10 mw. About 10 dB gain from 5 to 12 GHz. ERA devices work
>>> well at 5.6 GHz too.
>>>
>>> 73, Jerry, K0CQ
>>>
>>>
>>> On 1/24/2012 10:03 AM, Joe wrote:
>>>> Hello to the Group,
>>>>
>>>> Does anyone know of where I can get a MGF 1302 transistor or an
>>>> equivalent. I was told this item has been obsolete for many years now.
>>>> Perhaps somebody may still have one in their parts bins.
>>>>
>>>> I have an older model DB6NT 5.760 LO Osc and multiplier unit in a tin
>>>> box tuned to 5616 MHz. The last driver stage is shorted.
>>>>
>>>> I'm thinking about re-xtaling it as a beacon unit for on the 5.7 Band.
>>>>
>>>> Perhaps I am wasting my time on this unit and should look for something
>>>> else that is newer.
>>>>
>>>> This item was a freebe and thought it would make a nice low power beacon
>>>> TX.
>>>>
>>>> 73's
>>>> Thanks
>>>> Joe
>>>> WA3PTV
>>>> FM19bs
>>>>
>>> _______________________________________________
>
>
>
>
> On 2/4/2012 12:13 PM, cqbilld at q.com wrote:
>>
>>
>>
>> Just a couple of weeks ago I saw someone on the mw reflector looking for
>> MGF1302s ... I should have read the postings. Something (I have no real
>> idea what) killed my 2m preamp this week. I was working HF with the TS2000
>> normally used for 2m and I was using CW breakin keying while working HK0NA
>> DXpedition . This CAN NOT be done on 2m when using the preamp, because the
>> 2m sequencer is not activated by the breakin keying. I have no idea at all
>> ... but when I went to 2m last night with the breakin keying turned off, I
>> found the 2m preamp was DOA. VERY ODD ....
>>
>> Anyway ... RF Parts list the MGF1302s at $11.95@ ($25 minimum) ... So I
>> have a source, of sorts ... Anyone have "surplus" that you would be
>> willing to SELL? I hope I don't need 3 at $36 plus shipping! It seems
>> every couple of years .. something occurs and one of the preamps get
>> zapped.
>>
>> An aside ... anyone know of a drop in replacement? These where/are
>> wonderful devices .
>>
>> Yes I was successful working HK0NA, on several bands ... what a great ran
>> DXpedition that was!
>>
>> THANKS Bill K0AWU
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