Discussion in '"Boat Anchor" & Classic Equipment' started by WU7H, Jun 14, 2021.
Someone gave this to my son at a swap meet and we are wondering what it is. Thanks.
I have no idea what it is but damn, that's cool looking!
Dunno, but the fact that the filament voltage is adjustable puts it at 1920s or earlier.
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.
It's a piece of test equipment, judging by the hole that is clearly for a meter.
How about some pictures of the back?
It could be a left handed Veeblefetzer circa 1922.
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.
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 =)
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.
I know this isn't it, but it has some similarities with this Ducret 4 lamp radio receiver from the 1920s.