OLD softrock 455kHz/500kHz Assembly Instructions??

[WBear2GCR]

I did fail to find them online... anyone happen to have copies of the build instructions for the old/original Softrock 455kHz and/or 500kHz versions? I've got one of each here that need assembly, and I can't find them on my computer, and don't have a clue what the deal was with the toroids, etc...

If they are online, a link would be find.

                           _-_-

[WD8BIL]

This might help Bear. I've been super busy but will try to dig up the exact stuff.
For I.F. use the input BPF could probably be ditched.

http://amfone.net/Amforum/index.php?action=printpage;topic=24547.0

[WBear2GCR]

Good info... but what I need is simply the assembly instructions that include the toroidal input (was that what it was) transformer... and how to wind it for 455, and for 500kHz.

Tnx.

               _-_-

[WD8BIL]

That's the point..... the toroids are not really needed when using a fixed I.F. frequency.

[KA8WTK]

Tony Parks wrote:
>
> I think I have it "right" this time with the following set of component values for a 455 kHz v6 SoftRock.
>  
>  
>  
> C5 470pF
>  
> C6 220pF
>  
> C7 220pF
>  
> R17 22.1k (connected from base of Q2 to circuit ground on v6.0 board or in R17 position on v6.1 board)
>  
> L1 30T of #30 on a T30-2 core (4 uH)
>  
> L2 77T of #30 on a T50-1 core (60 uH)
>  
> T1 30T of #26 on primary and 16T of #30 in each of the two secondary
>  
> windings
>  
> "bifilar" over the top of the primary on a T30-2 core (4 uH on primary)
>  
> C21 = C23 = 0.033 pF
>  
> C22 = 2200 pF
>  
> Crystal X1 is 3.560 MHz with JP1 jumper set for divide by 8, pins 2 and 3
> bridged
>  
> I have three sets of the above components free to the first three who are fairly serious about trying a v6 SoftRock in a 455 kHz IF signal processing experiment.
>  
> 73,
> Tony KB9YIG

Do you need the builders notes? BTW, this is for version 6.0. What version is yours? I may have that also.

Bill KA8WTK

[WBear2GCR]

Tnx Bill, I will have to find the bag with the boards - think they are here at the /2 QTH.
That is an important detail.

I also have the 500kHz version, and iirc there was some slight difference in the toroid winding.