Hi Jim. Interesting question,but how can I made this audio translation? The 10 mHz signal period (T=1/F) is 100 seconds. So if I modulate in frequency or in amplitude a 1000 Hz carrier what sound can
Hi Stefan. I know this fail! I suggest a thermostat on the heat sink that remove the MOSFET DC supply. http://uk.rs-online.com/web/p/thermostats/2282636/ 73 de Claudio ik2pii -- ZE-Light e ZE-Pro: s
Interesting mission. https://directory.eoportal.org/web/eoportal/satellite-missions/d/dsx Here some details about the spacecraft transmission. http://smartech.gatech.edu/bitstream/1853/8037/2/SSEC_S
The navy VLF books are downloadable from this link: http://www.navy-radio.com/manuals/shore-vlf.htm But the VLF bible in my opinion is this book, with wires capacity formulas and tables: Arthur D. W
The scope is DC or AC coupled? I see a negative low level in both printout. 73 Claudio ik2pii -- ZE-Light e ZE-Pro: servizi zimbra per caselle con dominio email.it, per tutti i dettagli clicca qui S
HI Chris. Why you have a negative low level? Also in the previous post in channel B: 73 Claudio ik2pii -- ZE-Light e ZE-Pro: servizi zimbra per caselle con dominio email.it, per tutti i dettagli cli
If the HIGH level is too low the following divider can't divide properly! If the LOW level can sink few mA of current from the IC the divider can be degraded! Random divide factor can be a consequen
SNIP Few meters from the transmitting antenna: at those frequencies the "reactive field" dominate, so the inverse square law is non applicable. 73 de Claudio, IK2PII -- ZE-Light e ZE-Pro: servizi zim
I agree Stefan! And in my opinion if the transmission line is shorter than 1/10 of the wavelength ALL the impedance adjustments can be performed at the Transmitter side of the line. So the impedance
My few cents... 1- check if the antenna coil and transmitter ground share the same earth/ground connection. 2- build the simplest RF current meter (http://mirror.thelifeofkenneth.com/lib/electronics
And what's the transmission start and end UTC time? Claudio -- ZE-Light e ZE-Pro: servizi zimbra per caselle con dominio email.it, per tutti i dettagli clicca qui Sponsor: Soluzioni di email hosting
Here another ferrite compendium: https://people.zeelandnet.nl/wgeeraert/ferrietUK.htm Claudio, ik2pii -- ZE-Light e ZE-Pro: servizi zimbra per caselle con dominio email.it, per tutti i dettagli clic
-- -- ZE-Light e ZE-Pro: servizi zimbra per caselle con dominio email.it, per tutti i dettagli clicca qui Sponsor: Caselle con tuo dominio su piattaforma Zimbra, fino a 30 GB di spazio, sincronizzaz
HI Wolf! tube or pipe, that is the question top-secret ;-) Claudio ik2pii -- -- ZE-Light e ZE-Pro: servizi zimbra per caselle con dominio email.it, per tutti i dettagli clicca qui Sponsor: Idee rega
Interesting idea Andy, you are right but... ...some people can't live without the SWR meter on the transmission line: the harmonics not irradiated return toward the Tx and the SWR meter show an high
Yes Clemens, I agree. I mean that without the LPF the SWR meter measure all the harmonics reflected by the antenna, so the SWR measured can be a lot higher and can be cause of MOSFETS failure. I com
My 2 c Claudio, IK2PII -- -- ZE-Light e ZE-Pro: servizi zimbra per caselle con dominio email.it, per tutti i dettagli clicca qui Sponsor: Soluzioni di email hosting per tutte le esigenze: dalle case
Good from DC current to 500 kHz. But is better to solder all coils jumpers: https://www.qsl.net/ik2pii/lf/lf_coil.htm Claudio -- -- ZE-Light e ZE-Pro: servizi zimbra per caselle con dominio email.it
I'm using an e-field antenna in HF, it's about 6 - 10 dB lossy versus an 1/2 wave dipole. The probe is a beer can. In the earth environment the emf developed at the e-field probe is referenced to the
Someone interested in building vacuum tubes? Here you can download many interesting books about processes and material used to make vacuum tubes, including internal use RCA manuals. http://www.pmille
