I think we should proceed with caution we are fortunate in having the full allocation others may not be so lucky also some of the dormant NDBs may be activated rendering parts of the band unusable fo
Dear all. I have been following this thread from the start, and thought why build an Analog Oscillator when you most likely have a good one already i.e. my old FT707, if I tune from 3.776MHz to 3.832
Hello Roelof. A question regarding the Mini Whip mounting, in order to obtain height and mechanical stability the first section of the mast is 3m x 50mm aluminium tube, what minimum vertical separati
Stefan. Thank you for the info, maybe sometime you will be able to post the circuit? 73. Ken M0KHW Ah yes, Thomas was faster, damn ;-) Another image from the experimental setup, using source follower
Hi Stefan. Fully understand. 73. Ken. M0KHW Hi Ken, OK but later. I want to try some modifications, i.e. using the 500 Ohm input and the 18 kOhm output, to have some gain. If this does not affect the
Hi Stefan. What mechanical filter are you using?. 73. Ken M0KHW Christian, Are you QRV tonite? I would like to see or better hear the difference of my RX performance when using my band filter i was t
Hi Stefan. Thank you for all the filter info, definitely interested in them, at present for 500kHz I have a homebrew filter using two Toko transformers in between the antenna socket and two stage rx
Hi Stefan. I have resent this reply, I think the original with an attachment may have been blocked The answers to your questions are. My RX is a Kenwood TS140S. Antenna, 102ft doublet centre fed with
Hi Stefan. I should have said was there to remove any BC overload which it does vey well Ken M0KHW Hi Ken, I just tried to use the 500 Ohm input and the 18k Ohm output. It works UFB but then i got wo
To all LFer’s. Wishing you the seasons greetings where ever you are, and hope to meet you on the new 472 kHz band in the new year. 73s. Ken M0KHW IO91TV
Hi Mal. Thanks for the info, in my younger days as an electrical engineer occasionally had to work on live bus-bars so know the dangers, one of use got very badly burnt one day. I am still not clear
Hi Graham. I have about 60uF smoothing, did the ripple calculation from an old ARRL Handbook. Ken From: owner- [email protected] [mailto: owner- [email protected] ] On Behalf Of
Hi Mal. What valve are you using? I am currently building a TX with a 6293 Beam Tetrode in the PA. the building of the two power units has slowed the construction down with the inter-linking control
Hi Pete. Thanks for the info, I was really looking for a single paddle key not a bug but this one came up at a reasonable price. Should soon be back on LF the new input band pass filter for the RX pr
Hi Pete thanks for the additional info, I had expected to hear from Mal, being an avid cw person, this Sunday is the Cambridge Group’s Rally at Godmanchester, so I will be going there. Should n
Hi Mal. It would be very nice to have a 60ft vertical, you would not obtain permission where I live, 3m is the max without planning permission. Ken M0KHW From: owner- [email protected] [ma
Hi Ron. Thanks for the info, am I correct in thinking that it is dashes to the left and dots to the right, your attached info has no mention of this, it just says move to the dash position etc. 73. K
All. I have recently acquired a BK-100 Hi-Mound Bug type Key, although old, it looks as if it has never been used, the contacts are black, and does appear to have been set up, and not had any cable c
