[ARC5] 6SS7

[Geoff]

Its not very common but the HQ-129X has 4 of them and its predecessor, the 
6S7, has 3 in the HQ-120. A limited number of consumer radios used them 
mainly in a series string with more tubes than the usual AA5/AA6 and due to 
the 150ma filament.

Its a low transconductance tube and not especially good as an RF amp much 
above 12 MHz or so.

Carl


----- Original Message ----- 
From: "Ronnie Hull" <w5sum at comcast.net>
To: "Robert Eleazer" <releazer at earthlink.net>
Cc: <arc5 at mailman.qth.net>
Sent: Wednesday, February 06, 2013 9:38 AM
Subject: Re: [ARC5] 6SS7


> I've never actually seen one in use but
> I have a number of them in my nos tubes
>
> Sent from Ronnie's IPhone
>
> On Feb 6, 2013, at 8:20 AM, "Robert  Eleazer" <releazer at earthlink.net> 
> wrote:
>
>> I have been investigating my collection of five Detrola 438 receivers, 
>> sometimes known as the BC-1206.  I have found I have three separate 
>> varieties, and more on that later.
>>
>> But in the only set that works I have found a tube I have never seen or 
>> heard of before, a 6SS7.  I thought at first it was a bad label, despite 
>> that the marking is quite clear, but I can also seen the tube type 
>> embossed in the metal, so that is indeed what it is.  It appears that the 
>> other sets have a 6SK7 (2) in that spot, or else an unknown glass Ken Rad 
>> tube (2).
>>
>> Anyone ever hear of a 6SS7?
>>
>> Thanks,
>>
>> Wayne
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