GB3TN| The repeater is located near Fakenham. RX : Wood & Douglas unit was used up to 2000 when it was replaced with a Comtech front end + bespoke De-emphasis etc. with better sensitivity. Tx : Wood & Douglas PLL exciter + Mitsubishi PA run at 12W & a 3 pole interdigital filter. Power supply : Linear 10A 13.5v with 4 x 3055 pass transistors - ancient but reliable technology! Logic : bespoke - based on Cropredy test card generator modified in 1991 to produce a live analogue type S meter to show Rx signal level. In 2000 a PC was added to display pictures & info. A wireless access point was added in 2008 for remote update . |
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Antennas: 2 x Alford slot aerials (1 TX & 1 RX - default rx antenna) & 4 Directional DTMF selectable sectors (swiss quads ") added in 1992 when the tower was replaced. Structures : 10metre mast initially used was replaced in 1992 with a Francis & Lewis 22m TT30 commercial tower. |
Freq Input 1249Mhz with 1sec Video
North Norfolk Repeater Group GB3TN Cheques Payable to :- GB3 North Norfolk Repeater Group
A Howman, G0FVF
32 Dereham Road
Pudding Norton
Fakenham
Norfolk
NR21 7NA
Work required currently : Replacement of Alford slot weather cowling as original one is disintegrating after 18 years!
