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PU2YYP-L 146.580 Subtom 74.4 -SIMPLEX MAIRIPORÃ- SP

PU2YYP-R 146.470 Subtom 88.5- SIMPLEX MAIRIPORÃ- SP

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Desenvolvimento e  manutenção  PU2YYP / PX2Y-5876

Eduardo L. Castaldelli

 

Atualizado em:-

06- 12- 2012

 

     

 

Mods

Sony XDR-F1HD

Atenção: se você não tem pratica com o ferro de solda, não arrisque, consulte um técnico!!!

 

click na foto para ver as modificações

FASEADOR E CANCELADOR DE RUÍDOS

MFJ-1026

APENAS A FOTO DO ESQUEMA E ABAIXO O QUE DEVE SER FEITO

CONFIRA, PRÁTICO E SEM MISTÉRIOS

 

 

CLICK NA FOTO PARA VER

VEJA AS FOTOS DEPOIS DE MODIFICADO

Não retirei os componentes, apenas cortei as trilhas para facilitar

capacitor C8

Resistência R27

Resistência R26

L3 e L4

Capacitor C 16,  L5 e L6

Capacitor C16

Capacitor C8

Vista geral da placa


MFJ-1026 - MODIFICATIONS
COMPLETA


click na foto para fazer o download do arquivo

DEGEN 1103- MODS VLF
tiny comms receiver
 

It is possible to tune the 1103 receivers below 100kHz, and to disconnect the internal ferrite rod antenna on MW + LW, by using this simple procedure with the SCAN function.

Normally, a 'scan' will remain within the selected band, with the tuning scale showing progress through the band. If you start a scan from outside a band, the scan will become 'trapped' within the next band that is reached. However, starting between 1 & 9kHz above any band upper edge and scanning down, will bypass the 'band' system, and will not switch to the ferrite rod in the range 1710 - 100kHz. The tuning will also continue below 100kHz.

So, select 1711 by direct entry:- [1] [7] [1] [1] [band+/AM] and scan down: hold [BAND-] for 2 seconds. As soon as the frequency is below 1710kHz you can stop the scan and use the rotary control, or you can let the scan continue below 100kHz. The antenna is now switched for the telescopic or external antenna. I suggest you tune it down to zero and store this in preset 0, or store 99kHz in preset 99. Also store any frequencies for which you wish to use the external antenna input. You can store any frequency with the [SSB] mode 'on' for CW reception. Once you enter a frequency or change band on the keys, the system will revert to the normal tuning range and with the ferrite rod for MW + LW.
===========================================
There has been a suggestion that you must start the scan at 21951kHz because that was the designer's employee number, but that story is apocryphal!
===========================================

There is another procedure at http://mods.radioscanner.ru/degen/mod29/ for tuning above 30MHz (AM), possibly up to 35 - 37MHz depending on hardware alignment
===========================================
A recent posting on Youtube seems to promise a way to tune an 1103 receiver to the OIRT FM Band below the specified limit of 76MHz, in 10kHz steps:
http://www.youtube.com/watch?v=Y4QTEyM13Ds

I do not understand his procedure, which seems to be random, and I cannot persuade my DE-1103 to do it, so if you have any ideas please mail me
JH 18 Oct.09

fonte:- http://ukradio.info/Degen/VLF.txt


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