gareth wrote:

"Roger Hayter" wrote in message
...
gareth wrote:

"gareth" wrote in message
...

But it does raise one question, and that is, who is fooling who about
its purchase price of ooo £450, for there cannot be more than about
£40
in its component costs?

DDS modules, £8 ea

SA612 £2 ea

PIC processor, anything from £2 to £20 ea.

Double-sided PCB for ugly-bug construction, £5

If you did iit like that the circuit would be about a foot (ancient
American unit) across and wouldn't work.

Sorry, Grandpa, but the numbers above do not refer to valves (tubes to the
Yanks)
such as the 807, or, in your own case, bearing in mind your 50-year-old
second class Class B licence, such as the QQV03-20A or 4CX250B.


Ugly bug construction requires only a little more space than the devices
themselves.


Well I bow to your superior skills. I have never seen 'dead bug'
construction with SMD passives in large numbers, and four sided IC
packages with sub -millimeter pin spacing. I found just hand-soldering
the DDSs to the multi-layer circuit board sufficient of a challenge!



--

Roger Hayter