I don't see why not, Dimitris; my 501-504 kHz transmitter uses a 6AC7 Clapp VFO - 6AC7 untuned BA - 807 PA to a once conventional pi-network output. The VFO is in fact an old top band VFO with the co
Hello Dimitrios, LF Yes, the same thought has been on my mind for a long time now. The problem is that fundamental X-tals for this frequency band are nearly unobtainable. I have even tried to custom
Hello lf group, has anyone made or thought of making a 472 kc transmitter using vintage FT-241A xtals? I have three or four of these with fundamental frequencies in the 474 kc to 479 kc range, so I w
I am glad you found the eBay seller and your project is about to be revived. A VFO, as David G4DMP mentioned before, is also another valid option. It shouldn't be too hard to make a VFO stable enough
Hi Paul-Henrik, I bought a few crystals from this ebay seller: http://www.ebay.com.au/itm/FT-241-CRYSTALS-Many-to-choose-from-You-pick-/260897401407?pt=LH_DefaultDomain_0&hash=item3cbeb26a3f&_uhb=1#h
What a coincidence Dimitros! After answering to your posting I did a search on Ebay for FT-241 crystals and found the same seller - an order has already been made :) Many thanks for bringing up this
Hello Dimitrios, Yes lets share ideas and progess, hope I managed to get any crystals (very odd way of ordering and I don't know if I actually got any yet). There is already one mighty fine built exa
Hi all I have built a small QRP TX using tubes/valves for 500kc/s, it fits on the palm of the hand, sans PSU. Because finding Xtals for the band seems impossible I use two rocks and mix them, then VX
