Can you identify this?

Discussion in '"Boat Anchor" & Classic Equipment' started by WU7H, Jun 14, 2021.

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  1. WU7H

    WU7H Ham Member QRZ Page

    Someone gave this to my son at a swap meet and we are wondering what it is. Thanks.
     

    Attached Files:

  2. KC9YGN

    KC9YGN Platinum Subscriber Platinum Subscriber QRZ Page

    I have no idea what it is but damn, that's cool looking!
     
  3. KI4ZNV

    KI4ZNV Ham Member QRZ Page

    Dunno, but the fact that the filament voltage is adjustable puts it at 1920s or earlier.
    --scott
     
    W5MW and KA0HCP like this.
  4. KA0HCP

    KA0HCP XML Subscriber QRZ Page

    Looks like a receiver from the 1920's. Key features...

    -Selector switch for tapped coil for Frequency band
    -Selectable plug "C" Voltage for Grid bias
    -Variable "A" Voltage for Filament. Common on early sets for varying Sensitivity and also for Volume on sets that did not have additional amplifier tube.
     
  5. N2EY

    N2EY XML Subscriber QRZ Page

    It's a piece of test equipment, judging by the hole that is clearly for a meter.

    How about some pictures of the back?
     
  6. AJ4GQ

    AJ4GQ XML Subscriber QRZ Page

    It could be a left handed Veeblefetzer circa 1922.
     
  7. W1BR

    W1BR Premium Subscriber QRZ Page

    I have never seen panel markings like that on any 20s era receivers. OP toggle position and the % marking along with the tap bar switch knob construction suggest some sort of early 30s era test gear. Missing switches appear to allow metering of the fil and other voltages.
     
  8. WU7H

    WU7H Ham Member QRZ Page

    Thanks for the replies. Here is a photo of the back… not much to see.

    Not much left of it, but my son really likes it for some reason. People love giving stuff to kids at ham swaps =)

    73
     

    Attached Files:

  9. W9GB

    W9GB Ham Member QRZ Page

    Sadly parts stripped and missing the front Analog Meter (displaying voltage).

    Definitely a Bakelite Test Beach instrument to change Filament Voltage for Vacuum Tube gear.
    Based on additional switches, may have been able to read B+ voltage.
    Multi-tap AC transformers for multiple filament voltages (also found in vacuum tube testers),
    have a high failure rate due to breakdown of materials used a century ago.

    Roger Kennedy (All Tube Testers) wrote a short paper on the problem.
    http://www.alltubetesters.com/articles/transformer_issues.pdf
    ==
     
    Last edited: Jun 17, 2021
  10. KK9W

    KK9W Ham Member QRZ Page

    I know this isn't it, but it has some similarities with this Ducret 4 lamp radio receiver from the 1920s.

    Ducretet-4-Lamp-Radio-Receiver-1-Mahogany-1920_1600448139_8949.jpg
     

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