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ADAPTER BOARD - REDUX

K5ESS All Messages By This Member #28626 I'm planning on ordering more of the Type I to Type II DDS adapter boards.? They will be a re-spin that corrects the Sine 1 connections that required a modification to the previous boards.? Anyone interested let me know so I can size the order appropriately.? It will take two to three weeks after I order them before I can ship/ Mike K5ESS
richard kappler #28627 I'll take 3 more. 73, Richard W2KAP? toggle quoted message Show quoted text On Jun 20, 2017 10:07 PM, "K5ESS" <k5ess.nothdurft@...> wrote: I'm planning on ordering more of the Type I to Type II DDS adapter boards.? They will be a re-spin that corrects the Sine 1 connections that required a modification to the previous boards.? Anyone interested let me know so I can size the order appropriately.? It will take two to three weeks after I order them before I can ship/ Mike K5ESS
Larry Przyborowski All Messages By This Member #28629 开云体育 Hi Mike, I'd like three of them, please. 73, Larry K3PEG On 6/20/2017 10:07 PM, K5ESS wrote: toggle quoted message Show quoted text I'm planning on ordering more of the Type I to Type II DDS adapter boards.? They will be a re-spin that corrects the Sine 1 connections that required a modification to the previous boards.? Anyone interested let me know so I can size the order appropriately.? It will take two to three weeks after I order them before I can ship/ Mike K5ESS
Mvs Sarma #28630 Mike, As you are going for fresh pcbs,? perhaps It is worth? to incorporate? Auto level control , that helps near constant level at all frequencies. There are such mods for AD9850 /51. On Wednesday, 21 June 2017 9:00 AM, Larry Przyborowski <k3peg@...> wrote: Hi Mike, I'd like three of them, please. 73, Larry K3PEG On 6/20/2017 10:07 PM, K5ESS wrote: toggle quoted message Show quoted text I'm planning on ordering more of the Type I to Type II DDS adapter boards.? They will be a re-spin that corrects the Sine 1 connections that required a modification to the previous boards.? Anyone interested let me know so I can size the order appropriately.? It will take two to three weeks after I order them before I can ship/ Mike K5ESS
McCoy Phillips N5YAV All Messages By This Member #28631 I'm in for 2. McCoy N5YAV toggle quoted message Show quoted text On Jun 20, 2017 21:07, "K5ESS" <k5ess.nothdurft@...> wrote: I'm planning on ordering more of the Type I to Type II DDS adapter boards.? They will be a re-spin that corrects the Sine 1 connections that required a modification to the previous boards.? Anyone interested let me know so I can size the order appropriately.? It will take two to three weeks after I order them before I can ship/ Mike K5ESS
peatmoss - ki6ssi All Messages By This Member #28644 I'll take one please. Pete KI6SSI
John Backo All Messages By This Member #28674 "Auto level control" This is a complicated problem if hardware is to be modified. See, e.g., It is much easier to accomplish with the software controller, by compensating for the roll-off in the detector. That's what is done,e.g., in a AD8307 device. However, it may not apply to a VFO and there may have to be a hardware solution. though it could be accomplished with software/hardware even here. The consequence would to limit the output of the device. That may not be such a bad thing if a suitable amplifier is also added to adjust. Any way one looks at it, the solution is a bit more complicated than just modifying an adapter. That is a separate board, and not the function of a simple adapter in my opinion. But it could be done. john AD5YE
K5ESS All Messages By This Member #28676 开云体育 In this regard one significant difference between the Type I (7 X 3 pins) and the Type II (10 X 2 pins) is that the Type II modules don’t provide access to the R_SET pin of the AD9850/51 which would allow level control.? A modification to the Type II module would be required to accomplish this. Mike K5ESS ? toggle quoted message Show quoted text From: [email protected] [mailto:[email protected]] On Behalf Of Mvs Sarma via Groups.Io Sent: Tuesday, June 20, 2017 10:46 PM To: [email protected] Subject: Re: [BITX20] ADAPTER BOARD - REDUX ? Mike, As you are going for fresh pcbs,? perhaps It is worth? to incorporate? Auto level control , that helps near constant level at all frequencies. There are such mods for AD9850 /51. ? On Wednesday, 21 June 2017 9:00 AM, Larry Przyborowski <k3peg@...> wrote: ? Hi Mike, I'd like three of them, please. 73, Larry K3PEG ? On 6/20/2017 10:07 PM, K5ESS wrote: I'm planning on ordering more of the Type I to Type II DDS adapter boards.? They will be a re-spin that corrects the Sine 1 connections that required a modification to the previous boards.? Anyone interested let me know so I can size the order appropriately.? It will take two to three weeks after I order them before I can ship/ Mike K5ESS ? ?
bill All Messages By This Member #31340 Mike - I missed this round... do you have any adapter boards left? thx and 73 de bill
Ben Bangerter, K0IKR All Messages By This Member #31341 For information on a feedback approach for leveling the output of an AD9850/AD9851, see the AD603 data sheet and particularly the example discussed on p 18 of that document. ?The output of a DDS decreases with increasing frequency due to both the low-pass filter and the sin(x)/x characteristic of the discrete sin wave construction.
K5ESS All Messages By This Member #31350 开云体育 A couple.? How many dozen would you like J Mike K5ESS ? toggle quoted message Show quoted text From: [email protected] [mailto:[email protected]] On Behalf Of Bill K7WXW Sent: Monday, August 14, 2017 10:24 AM To: [email protected] Subject: Re: [BITX20] ADAPTER BOARD - REDUX ? Mike - I missed this round... do you have any adapter boards left? thx and 73 de bill
1practical.man All Messages By This Member #31351 开云体育 Forgive my potentially redundant question: how does this differ from Jacks W8TEE (?) board toggle quoted message Show quoted text On Aug 14, 2017, at 13:21, K5ESS <k5ess.nothdurft@...> wrote: A couple.? How many dozen would you like J Mike K5ESS ? From: [email protected] [mailto:[email protected]] On Behalf Of Bill K7WXW Sent: Monday, August 14, 2017 10:24 AM To: [email protected] Subject: Re: [BITX20] ADAPTER BOARD - REDUX ? Mike - I missed this round... do you have any adapter boards left? thx and 73 de bill
K5ESS All Messages By This Member #31364 开云体育 Jack’s TFT VFO board is designed to use a Type I AD9850 board (two rows of seven pins on one end and one row of seven pins on the other end).? The adapter board “adapts” a Type II AD98590 board (a row of ten pins on each side) to Jack’s TFT VFO board. Mike K5ESS ? toggle quoted message Show quoted text From: [email protected] [mailto:[email protected]] On Behalf Of 1practical.man Sent: Monday, August 14, 2017 12:29 PM To: [email protected] Subject: Re: [BITX20] ADAPTER BOARD - REDUX ? Forgive my potentially redundant question: how does this differ from Jacks W8TEE (?) board On Aug 14, 2017, at 13:21, K5ESS <k5ess.nothdurft@...> wrote: A couple.? How many dozen would you like J Mike K5ESS ? From: [email protected] [mailto:[email protected]] On Behalf Of Bill K7WXW Sent: Monday, August 14, 2017 10:24 AM To: [email protected] Subject: Re: [BITX20] ADAPTER BOARD - REDUX ? Mike - I missed this round... do you have any adapter boards left? thx and 73 de bill
Jack Purdum #31365 Well, actually my PCB uses the Type II and Mike's adapter board makes it possible to use a Type I board. You can see the difference here: It's confusing. We are thinking about going to a Type I with a new board simply because they are cheaper and easier to find. Jack, W8TEE toggle quoted message Show quoted text From: K5ESS <k5ess.nothdurft@...> To: [email protected] Sent: Monday, August 14, 2017 10:39 PM Subject: Re: [BITX20] ADAPTER BOARD - REDUX Jack’s TFT VFO board is designed to use a Type I AD9850 board (two rows of seven pins on one end and one row of seven pins on the other end).? The adapter board “adapts” a Type II AD98590 board (a row of ten pins on each side) to Jack’s TFT VFO board. Mike K5ESS ? From: [email protected] [mailto:[email protected]] On Behalf Of 1practical.man Sent: Monday, August 14, 2017 12:29 PM To: [email protected] Subject: Re: [BITX20] ADAPTER BOARD - REDUX ? Forgive my potentially redundant question: how does this differ from Jacks W8TEE (?) board On Aug 14, 2017, at 13:21, K5ESS <k5ess.nothdurft@...> wrote: A couple.? How many dozen would you like J Mike K5ESS ? From: [email protected] [mailto:[email protected]] On Behalf Of Bill K7WXW Sent: Monday, August 14, 2017 10:24 AM To: [email protected] Subject: Re: [BITX20] ADAPTER BOARD - REDUX ? Mike - I missed this round... do you have any adapter boards left? thx and 73 de bill
1practical.man All Messages By This Member #31372 开云体育 Thanks for the explanation!? toggle quoted message Show quoted text On Aug 14, 2017, at 22:57, Jack Purdum via Groups.Io <econjack@...> wrote: Well, actually my PCB uses the Type II and Mike's adapter board makes it possible to use a Type I board. You can see the difference here: <AD9850Types.jpg> It's confusing. We are thinking about going to a Type I with a new board simply because they are cheaper and easier to find. Jack, W8TEE From: K5ESS <k5ess.nothdurft@...> To: [email protected] Sent: Monday, August 14, 2017 10:39 PM Subject: Re: [BITX20] ADAPTER BOARD - REDUX Jack’s TFT VFO board is designed to use a Type I AD9850 board (two rows of seven pins on one end and one row of seven pins on the other end).? The adapter board “adapts” a Type II AD98590 board (a row of ten pins on each side) to Jack’s TFT VFO board. Mike K5ESS ? From: [email protected] [mailto:[email protected]] On Behalf Of 1practical.man Sent: Monday, August 14, 2017 12:29 PM To: [email protected] Subject: Re: [BITX20] ADAPTER BOARD - REDUX ? Forgive my potentially redundant question: how does this differ from Jacks W8TEE (?) board On Aug 14, 2017, at 13:21, K5ESS <k5ess.nothdurft@...> wrote: A couple.? How many dozen would you like J Mike K5ESS ? From: [email protected] [mailto:[email protected]] On Behalf Of Bill K7WXW Sent: Monday, August 14, 2017 10:24 AM To: [email protected] Subject: Re: [BITX20] ADAPTER BOARD - REDUX ? Mike - I missed this round... do you have any adapter boards left? thx and 73 de bill <AD9850Types.jpg>

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