GLB Electronics is no more, the remains were sold after the founder and chief designer Gilbert Boelke W2EUP passed away. Gil was a very gifted and talented RF design engineer - in addition to the Hybrid Ring Duplexer (see the Antennas Page at this web site), he designed and manufactured an excellent receiver preselector-preamplifier, and his regular appearing advertisement in 73 magazine (page one of this file) was the first inkling that many new hams of the 1960s had that stock VHF receiver performance could be improved and done so rather inexpensively. A 1990s price list is on page two of the file. Here's the instruction sheet that was packed with it. Gil's application document was available for an SASE, and also packed with every preselector (and Gil once commented that from the number of SASEs that they stuffed that it seemed to his office people that about a fourth to a third of 73s total readership must have sent SASEs at one time or another).

Gils preamp design was ahead of it's day, and was cloned by several companies without permission. When I met him at a hamfest I overheard him telling someone else that a couple of commercial receiver designs were using his preamp as the front end RF amplifier.

As of this writing (early 2010) the preamp is still being sold. See this info page (offsite link). The current version of the data packet on the preselector-preamp is here (about 1 MB, courtesy of WB6FLY).

Gil also designed and manufactured the first practical synthesizer for amateur radio, and it was marketed as a kit, or you could ge it assembled for a higher price. The marketing name for the 2 meter synthesizer was the "GLB Channelizer model 400" (Click here for a front panel photo). He called it the "400" because that's all he ever expected to sell - but he made and sold thousands. The "A" version was Gil's prototype, there were a few factory assembled and a bunch of kits of the "B" model sold, the main production was the "C" model, and there were a few "D" models sold. The "D" models were designed and produced after Gil got a new car and didn't have as much under-dash space - that model was in a half-high box, had a single row of switches, and a center off toggle for offset selection, labeled "+", "Ø" and "-" or "+", "S" and "-" (depending on the production run). There were also a large number of unauthorized "knock-offs" of the "C" model made, and for a while you could buy "GLB kits" at many amateur swap meets - two home-etched single sized PC boards, a baggie of parts, and a photocopied manual.

This rear photo shows "F" connectors for the RF out, but BNCs and RCA connectors were common - whatever the builder needed to match his situation. If the builder had a trunk mount radio (like a Motrac, Prog or Mastr-Pro) he simply ran two lengths of RG174 or RG58 from the synthesizer to a pair of small matching networks next to the crystal sockets of the radio, and the cleaned up RF was passed to the crystal sockets themselves.
Click here for a complete GLB 400B manual     Click here for the GLB 400B schematic only. Both of these files are courtesy of Steve NUØP

Anybody have manuals for a 400C or D ?

Or photos of a 400A, 400B or a 400D ?

Or interior shots of any Channelizer?

Gil also made several other RF module kits: see this advertisement page   581 KB PDF.

Anybody have any manuals for those RF modules?

That ad has the IDer crossed out, here are the manuals for those boards (they were popular for IDing a repeater, or for a beacon transmitter):

	ID-1A   453 KB PDF donated by Fred Gephart WA2CAM While the manual text refers to the ID-1, the circuit board picture shows the board labeled as the ID-1A.
	ID-2   276 KB PDF donated by Fred Gephart WA2CAM
	ID-2B   453 KB PDF donated by Fred Gephart WA2CAM
	ID-2C   725 KB PDF donated by Fred Gephart WA2CAM