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member - Thursday, March 15, 2012 at 08:08:22
Hickok designed Supreme I-177B Tube Tester, shown hear with the lid up, an excellent tester for early series valves including cold cathode rectifiers, with a made up valve base adaptor you could just about check anything on this. A very well built and rugged unit and fully tropicalized. It runs off 105 to 130 volts AC, measures "go - no go" and gm plus the usual shorts/gas tests etc, it is a dynamic tester using the ingenious circuit patented by Hickok in the thirties. A proper adapter for later valves was also made but pretty rare over here. The unit shown has its origanal valve data book, intact but minus it's front cover.

Lawrence 15/03/2012.
member - Thursday, March 15, 2012 at 07:40:21
Another AVO Mk1 Signal Generator, this one's had a hard life but still hanging together, normally sits on my bench permanetly set to 455 or 465 Khz.

Lawrence 15/03/2012.
member - Thursday, March 15, 2012 at 07:35:56
AVO CT 378A clam shell lid showing the intruction plate, this plate is hinged and when lifted storage is provided for attenuators, leads, modulation unit etc.

Lawrence 15/03/2012.
member - Thursday, March 15, 2012 at 07:32:32
AVO CT 378A test lead, 20 Db attenuator (75 to 75 Ohms) matching pad (75 to 50 Ohms) And an external modulator unit. Normally all stored in the lid of the unit.

Lawrence 15/03/2012.
member - Thursday, March 15, 2012 at 07:24:27
Yep another one...my old AVO 8, been through the "wars" this one, still going strong, as they do.

Lawrence 15/03/2012.
member - Thursday, March 15, 2012 at 07:20:54
This my AVO CT 378A Signal Generator, housed in it's clam shell case, made for the MOD, date unknown.
The generator covers 2 Mcs to 250 Mcs on harmonics, modulation can be either sine or square, it is fitted with a set level meter which makes the setting of the RF out accurate using the fully variable coarse and fine attenuators when properly terminated (75 Ohms)The scale is fitted with a mechanical shift adjustment, the tuning incorporates both coarse and fine adjustments, it comes with external attenuators/matching pad and an external mudulating unit. This particular unit is all workie workie and is in regular use.

Lawrence 15/03/2012.
member - Sunday, March 11, 2012 at 13:08:18
AR88 Loudspeaker, shown is the rear view, these speakers are low impedance, they can go for reasonable money or lots of money, I obtained the one shown in the pictures for reasonable money, but one recently sold at auction for quite a lot.
The cabinet is of a wrinkle finish.

Lawrence 11/03/2012.
member - Sunday, March 11, 2012 at 13:02:23
AR88 loudspeaker, shown is the bottom view of the cabinet showing the ID Plate it is type MI 22201, although not very clear the date stamp is 1944.

Lawrence 11/03/2012.
member - Sunday, March 11, 2012 at 12:58:01
RCA AR88 loudspeaker, shown is the front view of the speaker.

Lawrence. 11/03/2012.
admin - Tuesday, February 28, 2012 at 16:13:01
Now these are a good meter I have one and find them invaluable.

I have put the circuits in the Archive