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Radio Road Which tuner to get and getting the most from it. Thank God, for the radio! |
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Radio Road Which tuner to get and getting the most from it. Thank God, for the radio! |
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In Reply to: anything worth doing is worth doing to excess posted by Billoradio@aol.com on June 12, 2004 at 11:05:36:
I do try with AM on the SW and MW bands the 'tuner' has, but I think I would need a proper directional (tunable loop) antenna for that! My main reason for wanting hi-fi mono AM is the ABC's two services local and national both of which I value highly.I am an ex-grunt (AOT!?) who was a Coy signaller, to Cpl for a time, and later went over to B'n Int, from Sgt up to WO2 / SgtMajor. So I do know the issues and the tech side, a bit, mostly I carried an ANPRC 9, 9A or 25 back pack set.
At other times I was responsible for installing and maintaining the Battalion's G, A, and Q nets, usually run on the Australian designed A510. Tuned by crystals and each often need a vertical end-fed or a tuned long wire antenna. I was glad that as a kid climbing trees was a passion!
http://www.qsl.net/vk4czt/a510.htm
I know that even at HF or lower, antennas and their position matter, why is the good spot always 'out of cover' but, eh!
In Canberra in the ACT (+ Queenbeyan NSW) in Oz, we have the (public) ABC's 2 X FM stations (national networks) and the 'classical and jazz' one doesn't use any compression, except during 'drive times'. It is akin to the BEEB's Radio 3, and a VERY strong signal, by laws about coverage. It, and Canberra's local community arts and music station are what I listen to. I have always hated commercial radio, even when it was just AM, so the rest are of just > zero interest to me.
Most of the other local FM stations, incl. my no. 2 above, also transmit from that one big tower. Don't need a rotator.
But, we are right smack in the middle of the Great Dividing range running down the entire east coast of Australia. Canberra is VERY spread out in and among these hills, bowls and valleys. Lots of hills and Multipath, hence the long / large antennas and tall mast. We have hills over 1000 metres ASL, all around us within 2-3 miles.
The nearest FM sources outside the local region, are > 100km away in all directions and are mostly commercial stations, or low powered rural repeaters for the ABC which I don't need. Further, the mountains make DXing extremely difficult.
Tube front end means low sensitivity, it uses a Foster-Seeley detector! and needs hard driving, but geez is it quiet if you do.
The tube IF stage, when in full limiting, produces a range of harmonics right up into VHF III and UHF IV and V, which goes out up the cable. I posted here at AA about the TVI / RFI saga this caused me. The thing I learned is that even qualified technical advisors have to 'GET the context', before they will give you practical and sensible advice.
You may enjoy the story, do a search under my moniker as Author and TVI and RFI.
One other thing about tube tuners is the 'magic eyes'. I just love 'em, silly old me!?
I would love to use a pr for level meters!
Timbo in Oz
The Skyptical Mensurer and Audio Scrounger
Peace
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- FM DX? Nope - Timbo in Oz 17:55:17 06/12/04 (0)
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