Data and Documents

• hac_dx.zip (290K) A ZIP file containing PCX scans of the instruction book supplied with my H.A.C. model 'DX' single-valve receiver. As there was no circuit diagram supplied with the kit (only a wiring diagram), I've drawn the circuit and included that too. The letters 'H.A.C.' stood for 'Hear All Continents' and were the registered name of a small British company who sold receiver kits from the 1940s through to the early 1970s.
  
  
• hac_cat.zip (375K) A ZIP file containing PCX scans of the 1969 H.A.C. catalogue.
  
  
• hac_misc.zip (300K) A ZIP file containing PCX/JPG scans of several items related to the two H.A.C. documents above. There's a note about optional extras for the H.A.C. model 'DX', a letter from a satisfied customer (not me, although I was pleased with the set), an advertisement about the new 'Super' one valve model 'K' and a copy of the invoice I received when I ordered a model 'DX'.
  
  
• hac_pics.zip (240K) A ZIP file containing three photographs of my H.A.C. model 'DX' receiver, plus a photograph of the 2V-battery valve that came with the kit. There's also a scan of an H.A.C. advertisement that appeared in a 1969 issue of Practical Wireless. When I received my H.A.C. kit I was surprised that such an old valve had been included; I'd expected something a little more modern. Now of course, I'm very pleased it was so old. One thing: the r.f. choke and 4.7k resistor that you can see under the chassis were not supplied with the kit. I added them myself. The choke is in series with the 10k anode resistor and the 4.7k resistor is across the headphone sockets.
  
  
• hac_box.jpg (125K) This is a scan of the top of the box my H.A.C. model 'DX' was packed in. Useful if you make a replica of the receiver and want a box to go with it. If you think the label on the box looks a little strange then you'd be right. I'd written all over the box and label but some nifty photo-editing by G3ZPF made the whole thing look respectable again.
  
  
• battdata.zip (450K) A ZIP file containing three PCX scans of battery data from 1962. Each page is at 600 d.p.i. lineart, A4 size. The data is limited to physical dimensions, connector detail, Vidor - Ever Ready equivalents and the selling price in 1962.
  
  
• mpw.pdf  (Print optimised, 124K). A note on why I believe QRP'ers should use miles per root-watt instead of miles per watt. A screen-optimised version is available, mpw-scrn.pdf at 23K. Thanks to KJ5TF for the miles-per-Watt records (see http://www.madisoncounty.net/~kj5tf/mpw.html)
  There's information on QRP operation at www.qrparci.org and in the UK at www.gqrp.co.uk
  
  
• hybrid.htm (16K) A list of radios which use valves designed to work from a 12V h.t. rail. Also includes some other information relating to low-voltage valves.
  
  

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