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by satnipper
20 Jan 2021 16:06
Forum: Antennas
Topic: Blake FM8 Yagi feedpoint impedance & balun
Replies: 15
Views: 170

Re: Blake FM8 Yagi feedpoint impedance & balun

Incidentally did you ask Blake about the (lack of) balun? Their instructions do state connect with satellite cable which is 75 ohm. Are you sure there is no circuitry on the underside of the small connection board inside the junction box?
by satnipper
20 Jan 2021 15:52
Forum: Pirate Radio
Topic: Merseyside Stations
Replies: 21
Views: 2234

Re: Merseyside Stations

In a similar vein Concept/Central is on every Sunday evening from 18.00 at the moment on 100.8 MHz.

Stuart
by satnipper
20 Jan 2021 15:29
Forum: Antennas
Topic: Blake FM8 Yagi feedpoint impedance & balun
Replies: 15
Views: 170

Re: Blake FM8 Yagi feedpoint impedance & balun

"That balun will not provide a 300-75 ohm match. The SWR for a Triax FM8S is 4:1 over most of the band if you feed it with 75 ohm coax - or 5.5:1 for 50 ohm coax." I know. It's not intended to be a transformational balun. It's to prevent common mode currents on the coax outer. Hence it is a common m...
by satnipper
18 Jan 2021 12:27
Forum: Antennas
Topic: Blake FM8 Yagi feedpoint impedance & balun
Replies: 15
Views: 170

Re: Blake FM8 Yagi feedpoint impedance & balun

No but that may not important in practice.

However you could pick one of these up - https://www.ebay.co.uk/itm/203014857735 - and install at the antenna end. That way you would transform 300 to 75 Ohms for the cable run which you could still loop to prevent common mode currents introducing noise.
by satnipper
17 Jan 2021 14:24
Forum: Medium Wave & Long Wave
Topic: 1480 WGVU Kentwood MI
Replies: 0
Views: 20

1480 WGVU Kentwood MI

Very clear at 07:00 with full ID "“WGVU AM Kentwood WGVS AM Muskegon and WGVS FM Grand Rapids on 95.2. A service of Grand Valley State University and the Meijer public broadcasting center. real oldies…”

Totally dominant over WSAR.

Stuart
by satnipper
17 Jan 2021 12:54
Forum: Pirate Radio
Topic: Merseyside Stations
Replies: 21
Views: 2234

Re: Merseyside Stations

Bert Williams died of cancer in the week. He will be sorely missed by the Merseyside stations.
http://www.centralradio.info/Central-NE ... anuary.htm

Today MAR on 87.5 and FRW on 102.2
by satnipper
17 Jan 2021 10:36
Forum: Antennas
Topic: Blake FM8 Yagi feedpoint impedance & balun
Replies: 15
Views: 170

Re: Blake FM8 Yagi feedpoint impedance & balun

Simply coil the coax feedline 5/6 times. Job done.

http://ham-radio.com/k6sti/balun.htm

Stuart
by satnipper
07 Jan 2021 16:05
Forum: Off Channel
Topic: Request: Early Skywaves Bulletins
Replies: 10
Views: 239

Re: Request: Early Skywaves Bulletins

Message me please
by satnipper
07 Jan 2021 15:12
Forum: Off Channel
Topic: Request: Early Skywaves Bulletins
Replies: 10
Views: 239

Re: Request: Early Skywaves Bulletins

I have virtually every copy from the first to the last. In the cloud as well.
by satnipper
03 Jan 2021 13:57
Forum: Pirate Radio
Topic: Merseyside Stations
Replies: 21
Views: 2234

Re: Merseyside Stations

Central Radio is strong on 100.8 today. Going through to 01.00.

https://www.facebook.com/groups/310850062265266
by satnipper
01 Jan 2021 18:51
Forum: VHF Band 2, OIRT & DAB
Topic: The expert view -you need an IF bandwidth of at least 120kHz in order for RDS to decode.
Replies: 8
Views: 250

Re: The expert view -you need an IF bandwidth of at least 120kHz in order for RDS to decode.

The RDS sub-carrier is at 57 kHz and occupies a 4 kHz bandwidth (±2 kHz) of the spectrum. So you would need a signal with bandwidth 60 kHz at least to decode with SDR. Analogue filters will not be so "brick-wall" and so you'd need around 80 kHz with decent Murata ones.
by satnipper
25 Dec 2020 12:44
Forum: Pirate Radio
Topic: Merseyside Stations
Replies: 21
Views: 2234

Re: Merseyside Stations

Just about to post that they are on! But now dead air.

MAR strong on 87.5 in north-west Wirral. Wonder if Concept/Central will be on 100.8 later?

Stuart
by satnipper
24 Nov 2020 12:19
Forum: Member's Loggings
Topic: WHJJ Providence RI 920 kHz
Replies: 0
Views: 453

WHJJ Providence RI 920 kHz

A new one for me but very clear TOTH announcement at 01:59 UTC this morning.

https://youtu.be/wK74EMfh25U

regards

Stuart
by satnipper
17 Nov 2020 13:57
Forum: DX Alerts (FM)
Topic: Es Finland
Replies: 3
Views: 430

Re: Es Finland

There's been a fair amount of Sp E on 21/24 MHz last few days. This morning I noticed extensive Sp E on 24 MHz and almost no F2 support. Not surprised 6m has just opened to Eastern Europe and Scandinavia with some big signals. Slightly more surprised it's extended to Band II.

Stuart
by satnipper
12 Aug 2020 11:42
Forum: OIRT Band
Topic: Buxton beacons
Replies: 2
Views: 488

Re: Buxton beacons

It's on air right now, Julian.

Stuart
by satnipper
01 Aug 2020 12:43
Forum: Unidentified?
Topic: Two UNID Spaniards 107.9
Replies: 5
Views: 706

Re: Two UNID Spaniards 107.9

Jungla Radio "Somos tus amigos"
by satnipper
14 Jul 2020 17:42
Forum: Low VHF
Topic: D1DX
Replies: 0
Views: 539

D1DX

Just worked a new one on 6m to be aware of - D1DX KN87 from Donetsk People's Republic

Stuart
by satnipper
22 Jun 2020 13:23
Forum: Unidentified?
Topic: Ukraine 107.7?
Replies: 6
Views: 776

Re: Ukraine 107.7?

Good ears PFM. Chapeau!
by satnipper
21 Jun 2020 11:00
Forum: Pirate Radio
Topic: MAR back on 105 - with RDS
Replies: 3
Views: 919

Re: MAR back on 105 - with RDS

No sign of MAR on 105.0 here at the moment - 87.5 is good as usual
by satnipper
21 Jun 2020 10:49
Forum: Pirate Radio
Topic: Merseyside Stations
Replies: 21
Views: 2234

Re: Merseyside Stations

Ah - I heard 102.2 Saturday morning with good signal, free radio jingles and non stop music. Gone when checked in the afternoon.

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