radiofan wrote:A few thoughts about AM 730's return to the air ...
The first is to get it on 101.1 HD-3 immediately.
How quickly could the CKNW auxilary transmitter at the TD Tower downtown Vancouver be converted to 730? Not a huge signal, but it would cover more area than CKPM and Roundhouse combined.
xwdcatvb wrote:radiofan wrote:A few thoughts about AM 730's return to the air ...
The first is to get it on 101.1 HD-3 immediately.
How quickly could the CKNW auxilary transmitter at the TD Tower downtown Vancouver be converted to 730? Not a huge signal, but it would cover more area than CKPM and Roundhouse combined.
Ah, so this is where this myth of an "auxiliary" NW tx on the Black Tower mentioned in a DX discussion group possibly started.
Please explain how a station with a licence to serve New Westminster, and whatever Innovation, Science and Economic Development Canada have designated to transmit from 176th St and 88th Ave in NE Surrey, can suddenly be legally able to zap airwaves from atop 700 West Georgia?
Mike Cleaver wrote:IIRC, the CKNW transmitter on top of the TD Tower is an approved alternate site if the station cannot operate the main site for any reason.
It has a rubber duck antenna on top of the building, the same one CKWX has atop their building which also has an alternate transmitter there.
I recall that both are rated at only 500 watts but may be limited to 250 watts output.
That won't give much coverage for either station, especially with today's problems with AM interference.
Dave Glasstetter could give the official word on this or the current CE Rob Brown.
Russ_Byth wrote:From Gord Lansdell's NW Broadcasters:
AM 730 CHMJ Vancouver is expected to return to the air later today or early tomorrow after engineers retuned a standby antenna on the downtown TD Tower. Tower 4 at the main Burns Bog transmitter site was cut down around 12:20 p.m. Tuesday following a structural engineering recommendation and safety considerations. An insulator failed, plunging the tower off its base and 30 feet into the bog. The main building, common point building and tower 2 have been saved, but three tower huts were destroyed in the blaze.
The Commission notes that technical matters, such as the potential for frequency interference, are within the jurisdiction of the Department. In this regard, the Department has advised the Commission that, when CKER-FM began broadcasting at its current site, interference to the signal of CISN-FM Edmonton was found to occur in several parts of Edmonton, and that this interference was eliminated once the applicant commenced broadcasting on the adjacent channel 269C. The Department added that CKER-FM has been operating with interim authority on this new channel since May 2005, and that the Department is satisfied with the results. With regard to the use of channel 269B in Lloydminster, the Department noted that, while some small areas of mutual interference are predicted, the applicant has met the criteria for protection of an unused allotment and that the extent of the interference is considered acceptable.
Russ_Byth wrote:From Gord Lansdell's NW Broadcasters:
AM 730 CHMJ Vancouver is expected to return to the air later today or early tomorrow after engineers retuned a standby antenna on the downtown TD Tower. Tower 4 at the main Burns Bog transmitter site was cut down around 12:20 p.m. Tuesday following a structural engineering recommendation and safety considerations. An insulator failed, plunging the tower off its base and 30 feet into the bog. The main building, common point building and tower 2 have been saved, but three tower huts were destroyed in the blaze.
xwdcatvb wrote:Mike Cleaver wrote:IIRC, the CKNW transmitter on top of the TD Tower is an approved alternate site if the station cannot operate the main site for any reason.
It has a rubber duck antenna on top of the building, the same one CKWX has atop their building which also has an alternate transmitter there.
I recall that both are rated at only 500 watts but may be limited to 250 watts output.
That won't give much coverage for either station, especially with today's problems with AM interference.
Dave Glasstetter could give the official word on this or the current CE Rob Brown.
Hmmm, really. Or a reference within the actual licence to op? I mean, a broadcasting entity simply can't have facilities to go MoJo separate from their approved location without some rubber stamp... and I can't see anything in 'NW's paperwork that mentions that possibility, regardless of how low-powered the plant might be. Please feel welcome to inform me, and the rest of us.
Mebbe Civil Emergency comes into play, but still, there'd be an OK?
Auxiliary in my experience wuz a secondary/backup tx at the primary site powered by an alternative energy source (quite time-limited!)... the programming feed was the weak link.
07/07/16 - A report was received late last night from a DX'er in the Cariboo, in central BC receiving AM 730 CHMJ Vancouver. The back-up transmitter is intended to be 500 watts, but was running about 400 last night with only about 60% modulation until further antenna adjustments are made.
07/06/16 - AM 730 CHMJ Vancouver returned to the air during the dinner hour with 500 watts from the top of the TD Tower office building in the downtown area. The ISED (formerly Industry Canada) approval for temporary emergency service is 1 kW. 250 watts can be run without approval.
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