Fun times though Tony...
Strange to think that nearly sixty years ago I was sat at the table
making crystal sets and stuff and here I am, still doing it!
I blame Hans..
If it wasn't for him, I would have been out today cleaning the
windows and cutting the lawns as instructed by Mrs JVF...
Now I'm in trouble.....Hans's fault ;)
Philip G4JVF
toggle quoted message
Show quoted text
--- In QRPLabs@..., Tony Volpe <tony.volpe.1951@...> wrote:
but do you remember how the frequency ran away when you went anywhere near
the thing Philip?
I had some kits marketed under the name 'HAC' - Hear All Continents. And
you're right, they were ridiculously expensive and still are if you look on
Ebay. It was handy though that you could just plug in a different coil and
jump from Top Band receiving to Twenty Meters. Tuning in SSB on one of them
was a lark though wasn't it?
On 29 June 2013 19:47, Philip <pcteee@...> wrote:
**
Tell you what Tony, those Denco coils were expensive...
A lot of my pocket money went towards buying a couple when I was a lad.
Loved the idea of them coming in screen cans and that folded up paper
with circuits on...
Them were the days :)
Philip G4JVF
--- In QRPLabs@..., Tony Volpe <tony.volpe.1951@> wrote:
Is that a 'Denco' filter?
:))
Do you remember the Denco plug in coils? long ago, I had a regenerative
receiver kit that handled band changes just like that. They were really
terrible things, they could jump several kilohertz if you moved your hand
to the tuning knob or off it after you'd tuned something in.
Bzb
On 29 June 2013 19:11, Philip <pcteee@> wrote:
**
Done a mod today to make use of Hans pluggable LP filters...
Mounted the filter sockets on some PCB on the lid of the case.
These are coax wired internally and I can just swap out filters without
opening the box.
A small metal box then clips over the filter to screen and protect
them..
Picture here...
Running a test on 10 meters WSPR today into a loft dipole..
Conditions are poor but I'm getting spotted and the U2 is nice and
stable
Philip G4JVF
--- In QRPLabs@..., "Philip" <pcteee@> wrote:
Received my second kit this morning....thanks Hans
I had a box ready prepared for it.
This large box is designed so I can tinker with things like
filters power supplies and PA stages hence the roomy interior.
MK1 test bed is using a separate PA stage (no FETs on the kit board).
Driven from the DDR, this PA transistor gives me the output powers
shown scribbled in the circuit diagram.
I'm going to add a drive pot so I can set the output on all bands to
say 200mW or whatever.
This PA can drive a simple IRF510 to 3 or 4 watts if needed.
The kit board switches a relay which switches the 12 volt supply to
the
PA when in transmit..
Using external switchable LP filter box...
Rear panel has a 5 pin DIN socket for the external GPS module....
Much fun tinkering to come :)
Photos in this link...
Philip G4JVF
