[GreenKeys] 6AC7 tubes?

[hwhall at compuserve.com]

>used extensively as an IF amp. in early FM and television receivers
One of the tubes I was looking over today, a Philco made one,  actually had "cool television chassis" printed on it.

WayneWB4OGM

-----Original Message-----
From: Bruce Gentry via GreenKeys <greenkeys at mailman.qth.net>
To: GreenKeys at mailman.qth.net <greenkeys at mailman.qth.net>
Sent: Wed, Oct 30, 2019 6:11 pm
Subject: Re: [GreenKeys] 6AC7 tubes?

 6AC7 s are based the same as a 6SK7, but have a higher Gm, sharp cutoff,? and draw a bit more filament current. They were used extensively as an IF amp. in early FM and television receivers, as well as in the Hallicrafters S-30? "Ultra High Freqency" receivers.? They can often pep up a vintage general coverage receiver above 20MC. in the RF amp. position, but be aware of overloading and sometimes AGC problems. ?????? Bruce Gentry, KA2IVY
  
 On 10/22/19 1:12 AM, hwhall at compuserve.com wrote:
  
 Is there any interest in 6AC7 tubes? I keep passing up a bunch that are probably old stock in boxes because they don't seem to get any interest at Ebay or elsewhere. ?Should I buy some of these for anyone in the Mailman radio groups?
 
 Thanks,
  
 Wayne WB4OGM
    
  
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