<[EMAIL PROTECTED]> made an utterence to the drakelist gang ---------------------------------------------------------------------- For those interested in the QST construction article, I have some info on parts substitutions from the author as well as myself.
1) The VFD at Digi-Key is no-longer available. Substitute a Noritake CU16025ECPB-W6J, Digi-Key 286-1019-ND. 2) PIC16F876A is easier to obtain than the non A version. The same code works for either. The PIC Programmer has to know the difference. 3) The VCO can be bought directly from Minicircuits, (minicircuits.com). 5) Various flavors of OP-27 can be used. For example OP-27GP and OP-27EP (I’m using this one). 6) Grayhill encoder 25LB45-Q may be difficult (or impossible) to obtain. You can sub 25LB10-Q, 25LB15-Q, or 25LB22-Q (Digi-Key GH3073-ND). 7) The “Orion” relay should be Omron G5V-1-DC12. Also available from Jameco as PN# 184461 for $2.25. 8) The active devices are also available from a number of vendors, including Digi-Key. I prefer to buy parts from as few vendors as possible, regardless of cost. That way I don’t have to keep track of multiple orders. I won’t pay twice as much for a part but I will compromise a little on the cost. If you’re cheap, you can shop for the lowest prices until the end of time and never get to build the item. Sometimes you have to fish or cut bait. I ordered parts to build 2 synthesizers. One for the SPR-4, and the other for occasional use with either the R-4B or R-4C receivers. As far as enclosures are concerned, I have a couple of metal enclosures salvaged from old disk drive enclosures I kept for just such an occasion. They only need to accommodate a small power supply and the 9 ¼ x 3 7/8 PC board. I will have room to spare for extras such as a line fuse, etc. Since they are the same off-white color as the old PC’s of years gone by, I will simply overspray with flat black and call it a day. The boards will be assembled and tested sometime this summer when the weather outside is poor. Otherwise, I will be outside enjoying the good weather (if any) as much as possible and the project will have to wait. So why order now to build later? As stated previously, sometimes vendors tend to discontinue parts or disappear altogether in very short order. Sometimes vendors have limited supplies of a particular device and when it’s gone, they won’t restock because “there’s a better part available now”. It may be “better” but not necessarily compatible. That is the nature of business today. > > Some weeks back, there was a very brief discussion about the Drake > Crystal Eliminator article featured in the latest issue of QST. I seem > to remember that several critical components were no longer available, > such as the fluorescent display module and possibly the VCO. > > Questions: > 1. Has anyone been successful in getting the parts together for this > project? > 2. Has anyone actually built the project? > 3. Is anyone planning on building the project? > > If you have any experience with the Crystal Eliminator, I would > appreciate hearing about your experiences. > > Best Regards; > Gene > > W5DDW > Gene McCalmont > 270 Oakridge Road > Argyle Texas 76226 > > ---------------------------------------------------------------------- > Submissions: [EMAIL PROTECTED] > Subscribe: [EMAIL PROTECTED] - subscribe drakelist in > body Unsubscribe: [EMAIL PROTECTED] - unsubscribe > drakelist in body Hopelessly Lost: [EMAIL PROTECTED] - help > in body of message Brought to you courtesy of TLCHost.net > http://www.tlchost.net/ > ---------------------------------------------------------------------- ---------------------------------------------------------------------- On Behalf of <[EMAIL PROTECTED]> Submissions: [EMAIL PROTECTED] Unsubscribe: [EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost: [EMAIL PROTECTED] - help in body of message Zerobeat Web Page: http://www.zerobeat.net Brought to you courtesy of TLCHost.net http://www.tlchost.net/ ----------------------------------------------------------------------
