All set up to go, but no offical listening yet! Was too lazy to get out of bed near sunrise today . . . . I've usually ignored the MW X band due to weaker sigs and lots of unintelligible foreign languages. Set up a version of the 1AD MPF-102 regen from Owen Poole's site to tune the X band spread out over most of the dial. Wound up putting a Bogen T725 in the drain lead so I could use my SPP. Put a 2200 ohm resistor in the source lead in place of where the 2k DC phones are specified to go. The drain gives a lot more audio than the source. Needed a 1 nF from drain to ground ahead of the transformer for an RF return, otherwise the set does not work (RF blocked by the transformer windings). Some sigs 1610 to 1700 are a bit too LOUD with this setup. Antenna is about 60 feet of wire out a second floor window at 15 feet, with the ground running down the side of the house to a water tap near ground level.
I think that I will edit in comments to this post during the event, rather than making new posts.
So far I've noticed multiple sigs on many frequencies in the X band. With a copied out section of the amlogbook as my guide, this may turn out to be quite interesting . . . .
GL,
Garry
Hi Krys and all;
The T725 and SPP worked fine in place of the 2k DC phones in the source lead also. Louder than my 2k Brandes. But even louder in the drain lead. I know that one can make use of amplification in the drain lead and little or none in the source lead.
Charles Kitchen says that audio taken from the drain results in more instability, but I can't say I've noticed that. Using the source for audio makes the rig an "infinite impedance detector", which is supposed to be less likely to experience overload and have a higher quality audio signal.
Garry
Monday AM update -- 13 stations IDed 1610 to 1710 (NJ TIS on 1710). Getting IDs is tough going even with my print from the amlogbook. Was trying to sort out 4 stations on 1660 last night . . . .
Edited by - Garry Nichols on 1/20/2013 1:16:32 PM
Edited by - Garry Nichols on 1/21/2013 8:49:37 AM
TIS search at FCC (Traveler's Information Stations, also known as Highway Advisory Radio):
http://www.fcc.gov/encyclopedia/travelers-information-stations-search
Edited by - Garry Nichols on 1/23/2013 7:51:51 PM
I'm wrapping up my X Band effort with the 1 AD receiver and may continue with a crystal set:
1610 - CHHA TORONTO
1620 - WPTK490 SYRACUSE TIS WQMP335 VERONA TIS
1630 - KCJJ IOWA CITY
1640 - WKSH SUSSEX, WI - TIS somewhere in PA (wx info)
1650 - CINA MISSISSAUGA, ON - WHKT PORTSMOUTH, VA
1660 - WWRU JERSEY CITY, NJ - WBCN CHARLOTTE, NC
1670 - CJEU GATINEAU, QC - WOZN MADISON, WI
1680 - WPRR ADA, MI - WTTM LINDENWOOD, NJ
1690 - WVON BERWYN, IL - WPTX LEXINGTON PARK, MD - CHTO TORONTO
1700 - WEUP HUNTSVILLE, AL - KBGG DES MOINES, IA
1710 - WQFG689 TIS JERSEY CITY, NJ - (also music, likely some pirate)
Edited by - Garry Nichols on 1/25/2013 8:55:42 AM
Edited by - Garry Nichols on 1/25/2013 8:57:55 AM