[AMRadio] Germanuim 2N409 PNP transistor


Todd Carpenter n9ysq at yahoo.com
Tue Jul 20 18:06:30 EDT 2010


Current monodes are shrouded in a miniature black shroud, just a shadow of their former glory!

-----Original Message-----
From: Bernie Doran <qedconsultants at embarqmail.com>
Sent: Tuesday, July 20, 2010 16:34
To: Discussion of AM Radio in the Amateur Service <amradio at mailman.qth.net>
Subject: Re: [AMRadio] Germanuim 2N409 PNP transistor

I git one of them thar things in me 75A4, it git no filamet just sort of 
glows, gess they chngde the name. OA2
----- Original Message ----- 
From: "Todd Carpenter" <n9ysq at yahoo.com>
To: "Discussion of AM Radio in the Amateur Service" 
<amradio at mailman.qth.net>
Sent: Tuesday, July 20, 2010 8:31 AM
Subject: Re: [AMRadio] Germanuim 2N409 PNP transistor


> Its actually a "monode" there is no filament.
>
> -----Original Message-----
> From: Bernie Doran <qedconsultants at embarqmail.com>
> Sent: Tuesday, July 20, 2010 06:54
> To: Discussion of AM Radio in the Amateur Service 
> <amradio at mailman.qth.net>
> Subject: Re: [AMRadio] Germanuim 2N409 PNP transistor
>
> Transister? I that one of the those new fangled tubes with more than one
> grid? Bernie W8RPW----- Original Message ----- 
> From: "Jim Tonne" <tonne at comcast.net>
> To: "Discussion of AM Radio in the Amateur Service"
> <amradio at mailman.qth.net>
> Sent: Monday, July 19, 2010 10:47 PM
> Subject: Re: [AMRadio] Germanuim 2N409 PNP transistor
>
>
>>
>> Bill:
>>
>> First thing I would do is see if a cheap silicon transistor
>> (PNP, of course) would work.  They're a dime apiece.
>> If the supply voltage is several (as opposed to perhaps
>> 3 or so) a silicon transistor should work.  As I recall this
>> is the case.  In which case you can save yourself a
>> bundle of time and funds.
>>
>> - Jim W4ENE
>>
>>
>> Subject: Re: [AMRadio] Germanuim 2N409 PNP transistor
>>
>>
>>
>>
>>
>>
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