what would I need to do on the chip to get it working? also I am still in search of a software tuner where I can tune via keyboard. any recommendations? thanks Hank ----- Original Message ----- From: "Dave - WB6DHW" <brain...@wildblue.net> To: <soft_radio@yahoogroups.com> Sent: Wednesday, January 27, 2010 5:45 PM Subject: Re: [soft_radio] Re: LD-1 Discussion on Garage-shoppe.com Blog
> Hank: > I only had a chance to take a quick look at the schematic. It appears > that there is a thru position in the bandpass circuit that selects > bandpass filter. You should be able to use that below 2.1 MHz, but > could see harmonic responses. You could also modify on of the other > filters to cover below 2.1 MHz. The frequency control is an AD9834, > which should go down to audio without problem. > > Dave - WB6DHW > <http://wb6dhw.com> > > hank smith wrote: >> Hello I ordered mine all ready built >> he is not answering my questions either >> I don't think this can even go below 2.1 mhz either >> is your kis all ready built? >> I am visually impaired and am unable to sodder at this point. am reading >> articles on how to sodder but at this point don't know how to yet >> Hank >> ----- Original Message ----- >> From: "larryw8er" <robi...@roadrunner.com> >> To: <soft_radio@yahoogroups.com> >> Sent: Monday, January 25, 2010 9:12 PM >> Subject: [soft_radio] Re: LD-1 Discussion on Garage-shoppe.com Blog >> >> >> >>> Peter ... The Soft66AD is assembled and shipped at $122. The problems >>> are >>> with support and documentation and drivers/software. My experience is >>> that >>> emails are often not answered and telephone contact is not possible and >>> supplied drivers/software are weak, at best, for WinRad, not supplied. >>> As >>> for documentation, go to his website. The LD-1 appears to be a bargain >>> at >>> $200. I received mine today and will put it through it's paces tomorrow. >>> May order a second one while still at $150. >>> >>> --- In soft_radio@yahoogroups.com, "ni9n" <peg...@...> wrote: >>> >>>> Hank, the price goes up to $200 in about a week and a half. I think >>>> it's >>>> worth that. I see that the Soft66AD costs $125, plus shipping from >>>> Japan, but you have to put it together yourself. If you do that, I >>>> would >>>> advise you to use better surface-mount techniques than the ones >>>> recommended on the Soft66 website. Never, ever use a soldering iron. >>>> I >>>> like to use an electric griddle as a hot plate, along with a Weller >>>> butane soldering iron with a hot air blower tip. Monitor the >>>> temperature >>>> using an IR thermometer from Harbor Freight tools. I've described some >>>> techniques that work well on my blog, but nothing beats using a solder >>>> stencil. >>>> >>>> The LD-1 works quite well down to about 1 KHz, and does work at lower >>>> frequencies but with some spurious responses due to the low LO >>>> frequency. >>>> That could be fixed by changing the filter bands, and I might consider >>>> offering that as an option. I can't quite tell from the Soft66AD docs >>>> exactly what the frequency coverage is, he seems to make some claims >>>> that >>>> don't add up, but his english makes it hard to tell. >>>> >>>> I do use the AD9834, the same DDS chip that he does, but I actually use >>>> two of them. Both are programmed for the same frequency, but one is >>>> programmed for a 90 degree phase shift relative to the other. Start >>>> them >>>> at the same time, and you have an I / Q LO. Also, I've found a simple >>>> technique to greatly reduce the spurs from the DDS chips. I'm keeping >>>> it >>>> close to the vest, but it works. >>>> >>>> Modes like DRM are a function of the SDR host software you run on your >>>> PC. Rocky does not do DRM, but Winrad does. Whatever radio you decide >>>> to use, take a look at Winrad. >>>> >>>> >>>> --- In soft_radio@yahoogroups.com, "hank smith" <hanksmith5@> wrote: >>>> >>>>> will my softadh cover these same frequencies? >>>>> also what is the normal price after your introduction? >>>>> Hank >>>>> ----- Original Message ----- >>>>> From: "ni9n" <pegood@> >>>>> To: <soft_radio@yahoogroups.com> >>>>> Sent: Saturday, January 23, 2010 6:11 PM >>>>> Subject: [soft_radio] LD-1 Discussion on Garage-shoppe.com Blog >>>>> >>>>> >>>>> >>>>>> Thanks to those who have placed orders for or expressed interest in >>>>>> the >>>>>> LD-1 software defined receiver, which I am now shipping. Two of the >>>>>> first >>>>>> lot of five are still available (I will be assembling them in the >>>>>> morning, >>>>>> so they don't show up as in stock yet) and I have just ordered parts >>>>>> for >>>>>> the second lot. Those should be ready to ship later in the week. >>>>>> >>>>>> To recap the LD-1's features (which are fully described at >>>>>> www.lazydogengineering.com/LD1home.htm ) it is a soundcard-based SDR >>>>>> like >>>>>> the Softrock-40 and similar SDR's, but with a dual-DDS local >>>>>> oscillator >>>>>> using two Analog Devices AD9834 DDS chips. It will cover the entire >>>>>> 530 >>>>>> kHz to 30+ MHz range. On the low end it will probably work below 530 >>>>>> kHz, >>>>>> but I haven't tested it there. It may go as high as 37 MHz, but I >>>>>> haven't >>>>>> tried that, eiter. It is USB controlled, either from Winrad or from >>>>>> its >>>>>> own stand-alone application. While I haven't done any formal >>>>>> performance >>>>>> measurements, it seems very comparable to my FT-817. Except, of >>>>>> course, >>>>>> being an SDR it runs rings around any conventional receiver when it >>>>>> comes >>>>>> to operator convenience and agility. >>>>>> >>>>>> I don't want to distract from the main topic of this discussion >>>>>> group, so >>>>>> I would like to encourage anyone who is interested in the LD-1, or >>>>>> DIY >>>>>> surface-mount projects, small-scale product developement, ham radio >>>>>> entrepreneurship, etc. to visit my blog at www.garage-shoppe.com. >>>>>> >>>>>> >>>>>> >>>>>> ------------------------------------ >>>>>> >>>>>> Yahoo! Groups Links >>>>>> >>>>>> >>>>>> >>>>>> >>> >>> >>> ------------------------------------ >>> >>> Yahoo! Groups Links >>> >>> >>> >>> >> >> >> >> > > > > ------------------------------------ > > Yahoo! Groups Links > > >
