The SULA antenna

[JohnGreen-SWL]

Posted SULA outdoor front to back test using only feed line mod and 3m PVC mast in YouTube channel John Green-SWL
I will try preamp in place of balun tomorrow

[Andrew (grayhat)]

Posted SULA outdoor front to back test using only feed line mod and 3m PVC mast in YouTube channel John Green-SWL
I will try preamp in place of balun tomorrow

checked them, interesting, thank you !!

https://www.google.com/url?sa=t&source= ... HKGglurXKi

[JohnGreen-SWL]

Posted on YouTube SULA test indoors with preamp in place of 9:1 balun

[Andrew (grayhat)]

Posted on YouTube SULA test indoors with preamp in place of 9:1 balun

well... sounds like it's working, although my wild guess is that the MLA-30 preamp is somewhat acting, at any rate your arrangement seems to be working, and while the F/B isn't as impressive, the SULA seems to be doing its duty, all in all the idea is to have a quite forgiving design (amongst other features)

[13dka]

Posted on YouTube SULA test indoors with preamp in place of 9:1 balun

I tried that with a ML-200 (NTi/Bonito) preamp and the results were not good, the pattern disappeared and even reversed on some SW bands. The antenna really needs the balun to work.

[Andrew (grayhat)]

Posted on YouTube SULA test indoors with preamp in place of 9:1 balun

I tried that with a ML-200 (NTi/Bonito) preamp and the results were not good, the pattern disappeared and even reversed on some SW bands. The antenna really needs the balun to work.

agreed, and a preamp with a coax input connector

[JohnGreen-SWL]

Spotted this preamp on a local website
Is it suitable for the SULA

https://www.giga.co.za/ocart/index.php? ... uct_id=219

[Andrew (grayhat)]

Spotted this preamp on a local website
Is it suitable for the SULA

https://www.giga.co.za/ocart/index.php? ... uct_id=219

yes, but only if one isn't interested in MW since that preamp lower freq is 1MHz, also notice that it doesn't have an embedded bias-t circuit to power it over coax, so it will either need a battery or separate bias-t units

[JohnGreen-SWL]

Thanks Andrew I have my own Amplified Magnetic Loop which works very well on MW and its powered by a 12v battery so I can use it to power the SULA preamp

[Andrew (grayhat)]

Thanks Andrew I have my own Amplified Magnetic Loop which works very well on MW and its powered by a 12v battery so I can use it to power the SULA preamp

ok, but remember, that LNA lower freq starts at 1MHz so below that frequency...