GB3NBNorfolk Repeater Group encompasses GB3NB CURRENTLY OFF AIR
| If you would like to donate towards the above repeater please Contact David G0PFN details below David Catchpole, G0PFN 43 Welsford Road, Eaton Rise Norwich, NR4 6QB Cheques payable to Norfolk Repeater Group for £2 |
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The GB3NB membership is a annual fee of £2 to run from AGM to AGM. Good news is if you are under 16 it's free.
Location :- The repeater is located at Stoke Holy Cross in Norfolk.
Technical information :- The Repeater consists of 1 Jaybeam 1/2 wave dipole Type 7050 cut for 145 Mhz. The antenna height is approx. 60M, this is fed with 80M of Andrew LDF-450 heliax giving approx. 3db signal loss.
The duplexer consists of 6 cavities constructed to a John BilodeauWigan design originally published in July 72 QST also in “FM & REPEATERS “ and recently reprinted in ARRL antenna handbook 18th edition. Tx Energy is fed into the duplexer via a circulator and port 3 is terminated in a 50ohm dummy load ensuring a good match at all times thereby reducing any spurious emissions being made.
The TX/RX consists of a Pye/Phillips units (T4002 & R4002), logic is a modified GB3US mk1 with external pip tone generation at 875Hz & 1750Hz tone generation by a 7.168Mhz Xtal.CTCSS is also implemented on 94.8Mhz (F) There is no Timeout . A 1750hz tone or CTCSS will need to be used to re access the repeater. Output power is 25 W ERP.
If you have problems using the GB3NB or hear a fault then drop us a
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with some detail i.e. time date location. We cannot fix things we do not know about.
