BCT15X vs AOR AR mini

eorange

♦RF Damaged Member♦
Joined
Aug 20, 2003
Messages
2,982
Location
Cleveland, OH
The BCT15X is my main mil air scanner. The AOR is permanently parked on 260.900 MHz. This morning there's a fair amount of traffic on that freq, so I paused the BCT15X also on 260.900 MHz. The BCT15X missed well over 70% of the traffic that the AOR heard. And the radios have similar squelch settings, are about 2 feet apart, and both using the same exact antenna in the same location.

This is not the first time I've noticed this when compared to other receivers (like the Icom IC-R2). The BCT15X is good, but certainly not the best ever.

I continue to be convinced that older scanners are better for mil air!
 

eorange

♦RF Damaged Member♦
Joined
Aug 20, 2003
Messages
2,982
Location
Cleveland, OH
No ATT ever, and yes HI Mike I have the ZBSF-95-N+ FM trap. Ironically, the trap allows me to hear MORE since I added it to the 15X a few years ago, once I realized I had an FM broadcast problem.
 

KevinC

Other
Super Moderator
Joined
Jan 7, 2001
Messages
11,696
Location
Home

eorange

♦RF Damaged Member♦
Joined
Aug 20, 2003
Messages
2,982
Location
Cleveland, OH
The big three channels here are 3, 5, and 8. I'll look into it.

If I were to use both filters, would this ordering make sense?

Ant -> FM band stop -> 225 bandpass -> 15X
 

KevinC

Other
Super Moderator
Joined
Jan 7, 2001
Messages
11,696
Location
Home
The big three channels here are 3, 5, and 8. I'll look into it.

If I were to use both filters, would this ordering make sense?

Ant -> FM band stop -> 225 bandpass -> 15X
Looks like 3 and 5 are virtual now and actually on UHF, 8 is still on 8.
 

737mech

Member
Premium Subscriber
Joined
Aug 14, 2006
Messages
2,456
Location
Clark County, NV.
The other thing you can do for free is set all your Milair items to AM not auto modulation. We have learned digital scanners seek digital signals first and that is a built in delay. The 15X not a p25 digital but Edacs and Moto 800 back before P25 and LTR may seek those before analog AM. No need if you already know analog AM. So set that.
 

vagrant

ker-muhj-uhn
Joined
Nov 19, 2005
Messages
3,212
Location
California
I have used that PAR Mil Air filter for around 10 years. I even swept it and was fine with the result. If Dale posts a sweep for it, my sweep must’ve matched.
 

eorange

♦RF Damaged Member♦
Joined
Aug 20, 2003
Messages
2,982
Location
Cleveland, OH
225-379.975
25​
AM​
UHF Air
At 'Set Modulation' scroll to AM, NFM, FM, WFM, or FMB
there is no auto for modulation.
My bad, I was thinking of my digital BCD396XT, where I do set the modulation to analog as opposed to auto where it wastes time trying to figure it out. The 15X is analog only and therefore no auto.
 

Ubbe

Member
Joined
Sep 8, 2006
Messages
9,122
Location
Stockholm, Sweden
The other thing you can do for free is set all your Milair items to AM not auto modulation.
For Uniden scanners Auto means that it picks the modulation type from the bandplan setting so you don't need to set it yourself. For other brand scanners it could mean that it tries to first decode if its an analog or digital signal and mute the audio until the selection are done. Uniden have the All setting for that and also a setting how long it should mute, if at all.

/Ubbe
 

KI4VBR

Member
Premium Subscriber
Joined
Aug 4, 2009
Messages
238
Location
Palm Harbor, FL
My Unidens suffer overload from TV channels 8, 11 and 13, so this may be good choice (assuming it has enough attenuation on the low side) if the OP is close enough to any of those channels.
How did you determine that you had an overload issue with those channels?
 

KevinC

Other
Super Moderator
Joined
Jan 7, 2001
Messages
11,696
Location
Home
How did you determine that you had an overload issue with those channels?
My first clue was while mobile. When I got close to the antenna farm where every freaking TV station in the area is my reception died. A few open-stub filters proved it was the TV stations. Custom filters from PAR Electronics and problem solved.
 

eorange

♦RF Damaged Member♦
Joined
Aug 20, 2003
Messages
2,982
Location
Cleveland, OH
Thinking about filters a little more here: so right now the AOR is singing away on 260.900 MHz AM, hearing a decent amount of mil air traffic. Meanwhile the BCT15X is silent and just keeps on scanning past the 260.900 MHz channel.
  • The AOR uses no filters.
  • The BCT15X only has a Mini Circuits FMB band stop filter.
It was suggested that a mil air passband filter be utilized on the BCT15X. But what factors are at play in the AOR which seemingly makes it unnecessary for such a filter (or, clearly, any filters) ?
 

vagrant

ker-muhj-uhn
Joined
Nov 19, 2005
Messages
3,212
Location
California
Compare and contrast the selectivity and sensitivity of both devices.

Monitoring Mil Air is my fun so spending $50, or whatever it now costs, on a 225-400 filter was an easy decision for me. To address your other question about filters, I have five or six various filters inline before the Mil Air filter. I have crazy RFI and those filters handle things. I then port off from those filters into the Mil Air filter that then feeds dedicated Mil Air scanners and receivers.

* There is 10 dB of amplification in there after the initial chain of filters to handle losses and provide a slight boost.
 

eorange

♦RF Damaged Member♦
Joined
Aug 20, 2003
Messages
2,982
Location
Cleveland, OH
Top