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Title: OLD softrock 455kHz/500kHz Assembly Instructions?? Post by: WBear2GCR on February 23, 2016, 10:39:03 AM 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. _-_- Title: Re: OLD softrock 455kHz/500kHz Assembly Instructions?? Post by: WD8BIL on February 23, 2016, 11:05:17 AM 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 (http://amfone.net/Amforum/index.php?action=printpage;topic=24547.0) Title: Re: OLD softrock 455kHz/500kHz Assembly Instructions?? Post by: WBear2GCR on February 23, 2016, 07:38:02 PM 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. _-_- Title: Re: OLD softrock 455kHz/500kHz Assembly Instructions?? Post by: WD8BIL on February 24, 2016, 02:33:24 PM That's the point..... the toroids are not really needed when using a fixed I.F. frequency.
Title: Re: OLD softrock 455kHz/500kHz Assembly Instructions?? Post by: KA8WTK on February 24, 2016, 06:07:08 PM 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 Title: Re: OLD softrock 455kHz/500kHz Assembly Instructions?? Post by: WBear2GCR on February 24, 2016, 08:42:23 PM Tnx Bill, I will have to find the bag with the boards - think they are here at the /2 QTH. AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
That is an important detail. I also have the 500kHz version, and iirc there was some slight difference in the toroid winding. |