Re: [softrock40] Re: Winding the 10 metre BPF for the Softrock V6.3 and V8.3.
I think I noticed you saying that you are using Winrad. I don't
really know about Winrad, but in case of Rocky or PowerSDR you should
be seeing more than 60dB of suppression, with or without the 9V1AL
73 de Loftur, ve/tf3lj
2009/3/29 g7jur <philip.g7jur@...>:
> --- In email@example.com, "Alan" <alan4alan@...> wrote:
> Hi Alan.
> I did wind the coil as instructed, but I an using Alexs motherboard.
> This introduces an offset and takes the balance form 20 dB down to 10 dB.
> Moving the windings about on the can make things better.
> Philip g7jur.
>> ----- Original Message -----
>> From: "g7jur"
>> >I have found that the you wind the transformer T100 on the 10 metre
>> > BFP is very critical at 28 Mhz.
>> > Does anyone know the best way to wind it to produce the best balance of
>> > the I/Q
>> > output.
>> I presume everybody does what Tony says and winds both over the whole of
>> ring, secondary over the primary.
>> Use Rocky, or the auto adjust PSDR to check for balance, it is much
>> and easier than fiddling with sliders.
>> If you cannot balance with the coil plugged into the Softrock then look
>> a fault. I don't know about the motherboard but no-one has had trouble
>> the basic Softrock other than wiring the transformer incorrectly.
>> 73 Alan G4ZFQ