Some thoughts about apartments FM and tall buildings?

Two big problems.

Strong reflections, and aiming inside a ferro-concrete building? There are now GPS based compass apps for smart phones.

Mine seems to be unaffected by being indoors in our house which has a large number of (now redundant) AC-mains powered heating panels above the ceiling, which are still earthed, so are probably forming a partial Faraday screen.

Which reflection or main signal direction to aim at for station X?

I don't know if FM fool tells you the polarisation of each FM transmitter's signal. It is usually mixed ie some vertical and some horisontal or circular. A rhombic won't really 'care' about pol'n.

A T antenna mounted on a swivel either vertically on a sort of lazy-susan base / or horisontal may help you find the best axis for a rhombic. Use the signal-strength meter on the MR78 and listen. Or borrow a field-strength meter - if it's too optimistic. ? Lots of SS meters on tuners are, to make the tuner seem sensitive in the store.

Record the bearing that gives the least worst sound (best?) off the T-ribbon for each desired station. Then decide if you need a spread rhombic or two. It may depend on how many desired stations you have.

Warmest

Tim Bailey

Skeptical Measurer & Audio Scrounger

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Follow Ups Full Thread

Topic - McIntosh MR78 - Jim Austin 05:09:31 10/05/15 (18)

RE: McIntosh MR78 - Vinyl Rules! 17:34:19 11/16/15 (0)

RE: McIntosh MR78 - halvis 19:40:45 11/02/15 (7)

I am surprised that your response to a reception problem in a city - Timbo in Oz 01:13:08 11/03/15 (3)

RE: I am surprised that your response to a reception problem in a city - halvis 23:22:32 11/08/15 (2)

RE: I am surprised that your response to a reception problem in a city - halvis 02:43:13 11/09/15 (0)

No tuner made can help. - Timbo in Oz 00:44:28 11/09/15 (0)

I've never heard the Sansui 717 - 1973shovel 20:04:00 11/02/15 (2)

RE: I've never heard the Sansui 717 - halvis 20:27:06 11/02/15 (1)

i would think that a - very cheap - rhombic wire directional antenna, pointed in the right direction - Timbo in Oz 12:08:11 11/07/15 (0)

RE: McIntosh MR78 - gordguide 04:30:23 10/07/15 (7)

RE: McIntosh MR78 - Jim Austin 07:42:32 10/08/15 (5)

there is an excellent high-gain dierctional indoor option - Timbo in Oz 13:49:00 10/08/15 (4)

Thanks - Jim Austin 10:46:43 10/09/15 (3)

You can hide them under a big rug or pin them to a ceiling. - Timbo in Oz 21:55:57 10/09/15 (2)

RE: You can hide them under a big rug or pin them to a ceiling. - Jim Austin 07:43:21 10/12/15 (1)

Some thoughts about apartments FM and tall buildings? - Timbo in Oz 16:09:54 10/13/15 (0)

What Gord said~nT - Cleantimestream 17:04:33 10/07/15 (0)

RE: McIntosh MR78 - 6bq5 09:13:20 10/05/15 (0)

Follow Ups

Some thoughts about apartments FM and tall buildings? - Timbo in Oz 16:09:54 10/13/15 (0)

Some thoughts about apartments FM and tall buildings?

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