Chinese military AM/CW transmitter to match my Chinese HF receiver

[wd8das]

Now I've got a Chinese military AM/CW transmitter to match my Chinese HF receiver...

http://www.flickr.com/photos/32025136@N03/sets/72157637532984346/

It is model 102E.  The 102E is an electrical copy of the American AN/GRC-9 set, but the Chinese transmitter seems to be built in a more conventional fashion (as opposed to the unusual American compact backpack-style rig).

One bad power resistor replaced and it sprang to life, powered by my Heath UT-1 utility power supply.  The rig normally used either 425 vdc or 500 vdc for the plate supply.  With about 300 volts B+ and the internal switch set for the low B+ position the rig made about 10 watts out CW.  After testing (and confirming the caps involved would stand the high voltage) I changed to 700 volts B+ on the high B+ position.  That produced 50 watts CW output into 50 ohms - very nice.

A small amount of chirp is present, very little drift of the VFO, but all my testing has been on 160m so far.

Adding a PTT carbon mic produced 100% modulation 50w PEP.  Sounds pretty decent...

Here's a good introduction to the rig...

http://www.nf6x.net/2006/05/chinese-type-102e-hf-radio-set/

There's an english translation of the manual on the bama mirror site...

http://bama.edebris.com/download/military/102e/102E_Manual_Version_1_-_KD6B.pdf


Steve WD8DAS

[KA0HCP]

Congratulations on reviving an old dog!  It's quite a challenge to work on equipment with no hope of translating the language.  bill

[VE3AJM]

Looks like some of the gear and spare parts I bought from Red Star Radio in Markham, ON back a few years ago.

Nice gear.

Al VE3AJM

[flintstone mop]

Nice layout and very nicely built.
The schematic designations like C-1 or T-101 should be no problem. Numbers should be universal by the looks of the voltage selector.
The schematic looks ok to me.
Fred

[wd8das]

Thanks.  After my experiences with the Chinese 222-1 receiver I was not daunted by the language issue, but was surprised to find the technical manual in *English* online!  So it wasn't an issue after all. 

One of the most interesting things about this rig is the PA tube - it has a base and envelope like an 807, but has a filament instead of an indirectly heated cathode - fast warmup for battery operation.  Research shows this Chinese tube is pretty much like the 2E22 tube used in the GRC-9.

Steve WD8DAS

[WQ9E]

Steve,
The Chinese made some interesting stuff and this transmitter lifts a lot from the U.S. model.  I picked one up several years ago with a matching receiver.

The Type 116 I bought with a 7512 receiver was more difficult to figure out.  They made two versions and mine is grid modulated, apparently few were made with the plate modulation system.  It was still sealed in original cartons when I bought it.

[WQ9E]

And a few more photos.