Midland 13-520 2m FM HT

Santa Rosa NM tonight

12-610A Optimus AM/FM Stereo Mate Radio

I bought this at Radio Shack in about 2000.

Great FM stereo sound with headphones!

Majesty 400

Oil change and trans at 9425 miles.

remove factory stereo ford f 150 2015 and up

If you found the video useful please hit the "like" button https://binged.it/2tT2PID

Mod Pizza

1955

Pi Zero is a lot smaller than a Pi 3 B+

BRADY PALMQUIST shared 3 photos with you

BRADY PALMQUIST shared 3 photos with you  View photos You received this mail because BRADY PALMQUIST shared these photos with you. If you no longer wish to receive email notifications of shared photos, unsubscribe here. Get the Google Photos app Google LLC 1600 Amphitheatre Pkwy Mountain View, CA 94043 USA

Sedona

Half day

FYI

Jerrie and Austin making turkeys

https://www.facebook.com/bradypalmquistMN/videos/106415806035916/

Today

Tubes for Drake

Skip to site navigation (Press enter)

Re: [drakelist] T4X Final RF Tubes

Garey Barrell Mon, 21 Jan 2008 06:15:46 -0800

Garey Barrell <[EMAIL PROTECTED]> made an utterance to the drakelist gang  ----------------------------------------------------------------------  Eddy -

Nope, no cigar.......    

NO modifications are needed to either the T-4(any) or the TR-4(any) to use the 6GJ5s.

Pin 3 in the Drake 4 Line transmitters is the cathode of the final tubes. Pin 8 in the transmitters is grounded at the socket.

With 6JB6s, K is connected internally to Pin 3, and G3 is connectedinternally to Pin 8.

With 6GJ5s, K AND G3 are connected internally to Pin 3, AND there is _NO_ connection to Pin 8.

So everything works the same, except G3 is connected directly to K rather than via a 15 ohm and 3.3 ohm resistor.

The only difference is the interelectrode capacitance, which is small enough (0.5 pF) that the neutralization circuit is able to take care of it.

NOTE: RCA Tube Manual for Class A Operation states "G3 connected tocathode at socket".

73, Garey - K4OAH  Glen Allen, VA    Drake 2-B, 4-B & C-Line Service Supplement CDs  <www.k4oah.com>        EP Swynar wrote:  

"EP Swynar" <[EMAIL PROTECTED]> made an utterance to the drakelist gang  ----------------------------------------------------------------------  On Sunday 20th January, Garey wrote...    "...True, the G3 is brought out to Pin 8 in the 6JB6,   and that socket pin IS grounded in the T-4... However, in the 6GJ5 G3 is  brought internally to the cathode Pin  _3_. There is NO connection to Pin 8  in the 6GJ5.  Simple!..."    ***************************************    Hi Garey,    I think I'm beginning to understand all this, at last...!    What's been missing all along here, is the mandatory execution --- right  from the get-go --- of TWO crucial operations, i.e.:    (1) The wire from pin #8 to chassis ground at the final amplifier sockets in  the T4X must first be snipped, and,    (2) A new wire has to be added, jumpering pin #3 to pin #8 at both sockets.    What will be accomplished thusly is the following:    (1) The pin #3 cathode "break-out" of the 6GJ5 will now effectively be at  the pin #8-cum-pin #3 of the T4X socket, and,    (2) For better or worse, the suppressor grids of the 6GJ5 tubes will be at  the exact same potential as the cathodes (NOTE: is that an especially  good --- or bad --- thing?).    Failure to first execute the "...nip & tuck" at the sockets will leave the  current meter reading "zero" all the time, and the finals will be "on"  constantly...correct?    I wonder if it wouldn't be simpler to just re-wire the filaments for 12.6  VAC, & a pair of 12JB6's, Hi Hi!    ~73~ Eddy VE3CUI - VE3XZ      

----------------------------------------------------------------------  Submissions:        [EMAIL PROTECTED]  Unsubscribe:        [EMAIL PROTECTED] - unsubscribe drakelist in body  Hopelessly Lost:    [EMAIL PROTECTED] - help in body of message  Zerobeat Web Page:  www.zerobeat.net - sponsored by www.tlchost.net  ----------------------------------------------------------------------  

• Previous message
• View by thread
• View by date
• Next message

• [drakelist] T4X Final RF Tubes EP Swynar
• • Re: [drakelist] T4X Final RF Tubesjohn
  • • Re: [drakelist] T4X Final RF Tubes EP Swynar
    • • Re: [drakelist] T4X Final RF Tubes john
      • • Re: [drakelist] T4X Final RF Tubes EP Swynar
        • • Re: [drakelist] T4X Final RF Tubes Garey Barrell
          • • Re: [drakelist] T4X Final RF Tu... EP Swynar
            • • Re: [drakelist] T4X Final R... EP Swynar
              • Re: [drakelist] T4X Final R... Garey Barrell
              • Re: [drakelist] T4X Final R... EP Swynar
              • Re: [drakelist] T4X Final R... Garey Barrell
              • Re: [drakelist] T4X Final R... EP Swynar
              • [drakelist] Re: T4X freque... Jim Theisen
              • Re: [drakelist] Re: T4X fr... Garey Barrell
              • Re: [drakelist] Re: T4X fr... Jim Theisen
              • Re: [drakelist] Re: T4X fr... Garey Barrell
              • RE: [drakelist] Re: T4X fr... Terrell Hamilton
              • Re: [drakelist] Re: T4X fr... Jim Theisen
              • RE: [drakelist] Re: T4X fr... Peter Bent
              • Re: [drakelist] Re: T4X Ne... Jim Theisen
          • [drakelist] Re: Drake Low Pass Filt... Steve Berg

Reply via email to

• The Mail Archive home
• drakelist - all messages
• drakelist - about the list
• Expand
• Previous message
• Next message

• The Mail Archive home
•  
• Add your mailing list
• FAQ
•  
• Support
•  
• Privacy
• 4794A8FC.7080909@mindspring.com

BRADY PALMQUIST shared 8 photos with you

BRADY PALMQUIST shared 8 photos with you  4 View photos You received this mail because BRADY PALMQUIST shared these photos with you. If you no longer wish to receive email notifications of shared photos, unsubscribe here. Get the Google Photos app Google LLC 1600 Amphitheatre Pkwy Mountain View, CA 94043 USA

Sun is out at dunkin donuts 

Rainbowish left side