Author: Curt Benjamin via TenTec <tentec@contesting.com>
Date: Thu, 26 Oct 2017 00:47:13 +0000 (UTC)
Guys, since the N4YG DDS is no longer available and too expensive anyway, I have been exploring the idea of making my own. So far, I've taken the Arduino code to control one of those $8 AD9850 DDS mo
Curt.....its $100, but has RIT, AND a display.....just another idea that I pondered myself: http://www.pongrance.com/DDS2016.html Greg, KC8HXO _______________________________________________ TenTec m
Author: Curt Benjamin via TenTec <tentec@contesting.com>
Date: Thu, 26 Oct 2017 02:18:55 +0000 (UTC)
But Greg, a DDS made with a Arduino Nano, DDS module and crystal can be made for around $15 plus about $20 for a QUALITY encoder. Besides, that one doesn't have a voltage controlled RIT line. I would
Yup....I had pondered, but not taken it further. Was thinking the digital dial would be nice for some folks that had the slide rule readout, and wanted a change. I am in your camp.....but I enjoyed r
Do any of the ideas here help: http://www.karinya.net/g3txq/corsair_pto/ Steve G3TXQ On 26/10/2017 01:47, Curt Benjamin via TenTec wrote: Guys, since the N4YG DDS is no longer available and too expen
Curt, Can you not simply connect the RIT line to one of the Arduino analogue inputs and use that to generate a proportional frequency offset? That's what I did in my PIC controller. Steve G3TXQ On 26
I strongly suggest that you give some attention to how "clean" the DDS output was before yanking the PTO. By "clean" I mean the presence of spurs and birdies on the rx/tx signal. 73, Barry N1EU _____
Aloha Curt! Have you looked at the AQRP VFO? $40. Si570 based. http://www.qsl.net/k5bcq/Kits/Kits.html PA0KLT VFO kit. $45 or so (price is in pound sterling) Si570 based. https://www.sdr-kits.net/ind
Im looking for a DDS VFO replacement does does 5.00 to 5.550 mhz but with a optical encoder and NO mechanical click/clicker anyone know of such a beast? Mike, WB8VGE www.theheathkitshop.com _________
Author: Curt Benjamin via TenTec <tentec@contesting.com>
Date: Thu, 26 Oct 2017 20:49:37 +0000 (UTC)
Steve, I've run that idea by a few Arduino guys including AD7C himself. They say yes, you can use one of the analog pins and you can "map" the 0-5VDC to say, an offset of +/- 1000 Hz but they say it'
Talofa Mike! Mouser sells an encoder without detents for about a buck or try to remove the detent mechanism from the one that comes with the kit. 73, -Bob ah7i/w4 -- -do not look into LASER with rema
Mike, check out: http://qrp-labs.com/vfo.html This one has a "clicker" but as someone mentioned here you can get one for a buck or two that does not click and will likely drop into the PC board patte
Author: Curt Benjamin via TenTec <tentec@contesting.com>
Date: Thu, 26 Oct 2017 22:15:07 +0000 (UTC)
Steve WIK and Bob, thanks for the links to the DDS kits. If one of them just had a voltage-controlled RIT line and I could limit the output between 5 and 5.5MHz, I would jump on one of them. Right no
Curt, The Arduino analogue inputs provide 1024 level discrimination. Translated to +/- 1000Hz that equates to 2Hz steps. I don't know why that would be considered not smooth enough? I sent you the so
Just remember that TT went to great lengths to have pure LOs. The Orion was a beast in making sure that the LO was as good as the time allowed. Wonder what engineers designed that. Never have heard t
Yes, that's what I was alluding to in my previous post. The LO spectral purity will go from very clean/excellent to not-so-clean/fair with the DDS. If you get the chance, have a look at one of the DD
My idea is to use a DDS VFO as a VFO for an old Heathkit SB-104 take the output of the DDS through a filter to produce a sine wave for the mixers and so on. and use that beautiful gas discharge displ
There's a chip one can use in a rotary encoder application that uses a magnet . The chip senses the magnetic field as the magnet rotates. I'm wondering if an RIT could be built using a electro-magnet
The DDS is actually cleaner than the PTO for "close-in" noise. If I inject an S9+60dB signal into my CorsairII and position it just outside the receiver pass-band, then swap between the DDS in the ex
Doug Smith was a contract engineer who was the principal designer of the Ten Tec Orion. http://www.tentecwiki.org/webarchive/orion/ Reed / WW3A _______________________________________________ TenTec