[HBR] Hi Guys

[KBG Luxford]

Hi Kees,

Firstly, thanks for putting together your wonderful site.

No I do not have an HBR receiver nor have I started to build one.  I am 
retired now, I am a graduate electrical engineer, but in my day, we were 
immersed in heavy machines rather than electronics.  So I am trying to 
make up for my lack of knowledge by building home brew receivers and 
learning as I go.

When I was a schoolboy, I built a double conversion superhet (1600 KHz 
and 100 KHz IF frequencies) on a piece of Al sheet.  No chassis.  It was 
propped up against the wooden leg of the spare bed in my room.  I hope 
to do a little bit better with my current efforts.

My humungous power supply is just about completed - just have to add the 
delay circuit to switch on the plate transformer after the heaters are 
good and hot.  This will power a receiver and a moderate transmitter 
(possibly a pair of 807s in the final).

I have a number of possible paths for the receiver.  I have a heap of 
spares for my NZ Army ZC1 MK II transceiver, including 465 KHz IF 
transformers.  So one way to go is to build a more updated version of 
the ZC1 receiver with better selectivity and a product detector for SSB 
reception.

Another would be to experiment with triode cascode RF amplifiers for 15 
and 10 mx, various types of mixer, noise silencer and Q-mult circuits. 
As I know very little about receiver design, and intend learning the 
"suck and see" way, I have in mind using a Hammond Al chassis as a base, 
and placing on it standard strips consisting of Al sheet strips about 2" 
wide screwed to Al C section.  Now with a template fabricated from sheet 
steel, the strips should have their mounting holes identically spaced, 
which should result in easy replacement of a strip should this appear 
desirable.  The C section should give good shielding as well.

I have no doubt that I will plagiarize like mad interesting circuits on 
your site.

Incidentally, I found an old Meissner catalog on someone's web site (may 
have been yours) and this specifies the inductances of their various IF 
transformers.  Very valuable should I have to wind my own!

Well, sorry for the bandwidth, but now you can see broadly where I am 
headed.

Vy 73
Kevin
VK3DAP / ZL2DAP