Tnx to all who replied on this subject. BFI seem to be the preferred UK supplier for micrometals. I actually need some of the smallest cores T20-2 or similar for a bank of sixteen 11th order elliptic
Oh dear - !!!!!! :-( Glad I've gone back to microwave operating - no one else being rude to others up there, and more scientific experimentation going on. By the way, the abbreviation is dB not db, a
Does anyone know of a UK supplier of Amidon iron dust cores - they may be called American Cores & Electronics now, according to the Amidon web page. The web is not too helpful at finding a UK stockis
On the subject of the close of GBR, presumably the Govt. will be trying to sell the site now. SO where is the MSF 60kHz transmission going to come from ? Its use for 'official' time and frequency tra
Yes, QEX December 2002. The tank coil was located about 30mm away from the perforated steel casing and when the Tx was running at the 700W level the casing immediately above the coil reached over 100
Whoops ! - deleted the message with the URL before downloading - can you send it again please. Andy 'JNT Wolf, I just downloaded CalcEd and gave it a try, CalcEd is BRILLIANT! tnx & congrats 73 Johan
Without TLA's the armed forces would stop! Regards Simon GM4PLM Ex-PORS(SM) - RNSMS Petty Officer Radio Superviser(Submarines) - Royal Navy Submarine Service (do I get a gold star for that :-) More s
I'll leave this running until late evening then staying on 10s dots, since it is audible at reasonable distances. It shows how we've come on in capability in the six years. A 300uW ERP signal being d
The low power beacon will be running all day. 10s dot SlowCW on 71900.000. Andy G4JNT Just worked Jim for what may well be my last 73KHz QSO but are there any other takers? 73 de Ian GI8AYZ/MI0AYZ
I'm keeping a low power SLOWCW transmission running. Frequency 71900.000Hz. dot length 3s, power output to antenna 5W, so about 100uW ERP. Andy G4JNT (remembered not to use G8IMR this time !!)
OMG!!!!!!!!!! I was just testing out my old 73kHz loading coil - with the possibility of the odd QSO. Plugged in the beacon keyer and didn't notice it was still set from the last 10GHz event where I
1.5Hz Doppler at LF? That's a very fast moving ionosphere. Andy G4JNT Received this via G4FKK "QRM and QRN levels are low in Ghana at the moment and I'm receiving a constant signal from DCS39 at good
I sucessfully use 74HC and 74HCT familty to at least 30 - 40MHz. It can often be pushed to just above 50MHz. If you want to got faster, the 74ACT family can be used as buffers to beyond 100MHz, but c
Thans to those who replied to me directly on this subject, there certainly does appear to be some interest and in 2 - 3 weeks I'll be in a position to listen for some weak signals. In the meantine ho
At the end of this month a long term writing task will come to an end and I can begin to look at a number of various shelved projects again. One of these is GPS locked BPSK for LF. With a low cost GP
In these days of political corrrectness, how about the term SO for 'Significant Other' - easy to send on CW. Andy Then there was OG = 'old girl' but even 40 years ago that was used very rarely. About
RU Sure ??? The RA1792 (the following model from the 1772 perhaps) displays the actual frequency at the middle of the filter passband, then generates an audio frequency output as defined by the BFO s
On Sunday I had a pre-arranged QSO with G3YGF over the grand distance of 7.2km! Julian had an NoV but had never transmitted on teh band. In 1997 with me transmitting we raised the distance (for one w
If Droitwich is passed through a 1Hz bandwidth filter there is no sign whatsoever of the residual phase mod. I was receiving 198k this morning before deciding to change to 77.5 for the evening run. D
Just for a bit of a challenge I've just set up the receiver monitoring DCF77 on 77.5kHz, with the Caesium beam turned on for the first time in over a year. It was very disconcerting to find that I wa
