[GreenKeys] ST-6 Receive lamp failure - looking for areplacement source

[Lee Mushel]

Gosh yes!   That's what I do with all lamps in teletype gear.   I used to use small fluorescent lamp assemblies---lots better than looking at "dark" machines!

Lee    K9WRU
  ----- Original Message ----- 
  From: Jack Hart 
  To: 'Duncan Brown' ; greenkeys at mailman.qth.net 
  Sent: Saturday, December 14, 2013 10:30 AM
  Subject: Re: [GreenKeys] ST-6 Receive lamp failure - looking for areplacement source


  Replace it with an LED....

   

   

   

  From: greenkeys-bounces at mailman.qth.net [mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of Duncan Brown
  Sent: Saturday, December 14, 2013 10:27 AM
  To: greenkeys at mailman.qth.net
  Subject: Re: [GreenKeys] ST-6 Receive lamp failure - looking for a replacement source

   

  Russ,

  The "Receive" and "STBY" lamp circuits look the same, so measure the voltage across the STBY lamp (when  its on).  They are probably running the lamp at about 80% of its rated voltage to make it last longer (since it is soldered in).  If you measure a bout 10V, then it is probably a 12V bulb. Then measure the voltage across the lamp's series resistor to get the lamp's current.  This should give you some idea of what kind of lamp HAL used in the circuit.

  Good luck & have fun,

  Duncan
  K2OEQ




  On 13-Dec-13 12:05, Wa3frp wrote:

    My incandescent receive lamp on my ST-6 has failed.  (they don't make stuff like they used to. This lamp was only in service since 1970)

     

    Checking the HAL manual, as I built this as a HAL kit, I see that it is only called out as incandescent lamp.

     

    Bill Henry, if you see this, do you remember any specs on these lamps?  I'd like to replace it and buy a spare for the companion Standby lamp that has still not failed (must be on the air too much). 

     

    Otherwise, is anyone in a position to part-out a  lamp from a non-working ST-6?

     

    Thanks and 73

    Russ - WA3FRP
    wa3frp at aol.com






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