Re: Topband: RX antenna ???
Hi everybody !!!, Thank you very much for all the information and special THANKS to one friend that will help with Transformer and Terminator Resistor. I need some information about Preamplifiers for flag anntenna now...i read about W7IUV preamp but i visited Larry´s website and i can not access to the preamp...any idea??? Thanks !!!, 73, Doug, CO8DM - Mensaje original - De: Mike Waters mikew...@gmail.com Para: Douglas Ruz (CO8DM) co...@frcuba.co.cu CC: topband topband@contesting.com Enviado: Thu, 27 Aug 2015 19:42:02 -0400 (CDT) Asunto: Re: Topband: RX antenna ??? www.w0btu.com/Beverage_antennas.html#Terminating_Resistors 73, Mike www.w0btu.com On Thu, Aug 27, 2015 at 11:37 AM, Douglas Ruz (CO8DM) co...@frcuba.co.cu wrote: About the resistor: what kind of material???...carbon, right? and what power will disipate the resistor ? _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: RX antenna ???
Doug, Go to http://w7iuv.com/ and click on W7IUV preamp in the left column. That is a link to a PDF file, presently http://w7iuv.com/preamp60/preamp_r60.pdf . 73, Mike www.w0btu.com On Fri, Aug 28, 2015 at 10:05 AM, Douglas M. Ruz Sobrado co...@frcuba.co.cu wrote: ...i read about W7IUV preamp but i visited Larry´s website and i can not access to the preamp...any idea??? _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: RX antenna ???
Don’t know if this Rev 5 is the latest as Larry made some value changes over time. www.mtmscientific.com/preamp.pdf Steve WB6RSE On Aug 28, 2015, at 10:12 AM, Jeff Kincaid w...@sbcglobal.net wrote: Now that we've all retested the broken link, does anyone have a copy of the pdf? 'JK _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: RX antenna ???
kitsandparts.com sells a kit of an amp of similar design as the W7IUV design. I have not used it personally. There are probably others around. 73, Larry W6NWS -Original Message- From: Douglas M. Ruz Sobrado Sent: Friday, August 28, 2015 11:05 AM To: Mike Waters Cc: topband Subject: Re: Topband: RX antenna ??? Hi everybody !!!, Thank you very much for all the information and special THANKS to one friend that will help with Transformer and Terminator Resistor. I need some information about Preamplifiers for flag anntenna now...i read about W7IUV preamp but i visited Larry´s website and i can not access to the preamp...any idea??? Thanks !!!, 73, Doug, CO8DM - Mensaje original - De: Mike Waters mikew...@gmail.com Para: Douglas Ruz (CO8DM) co...@frcuba.co.cu CC: topband topband@contesting.com Enviado: Thu, 27 Aug 2015 19:42:02 -0400 (CDT) Asunto: Re: Topband: RX antenna ??? www.w0btu.com/Beverage_antennas.html#Terminating_Resistors 73, Mike www.w0btu.com On Thu, Aug 27, 2015 at 11:37 AM, Douglas Ruz (CO8DM) co...@frcuba.co.cu wrote: About the resistor: what kind of material???...carbon, right? and what power will disipate the resistor ? _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: RX antenna ???
On Fri,8/28/2015 9:53 AM, Mike Waters wrote: Go tohttp://w7iuv.com/ and click on W7IUV preamp in the left column. That is a link to a PDF file, presently http://w7iuv.com/preamp60/preamp_r60.pdf Both the pdf link and the W7IUV preamp link on his main page get me to an Error 404 Page Not Found from qth.com 73, Jim K9YC _ Topband Reflector Archives - http://www.contesting.com/_topband
Topband: Kits 'n Parts Preamp Kit Works!
I built one of these preamps way back when Diz first began offering them. It works great! I also purchased several spare 2N5109 as he had the best price. Again, good transistors. I tested the K ‘n P model preamp which I had built for a friend against a W7IUV which I had built some years before ‘dead bug” style for myself and both showed about the same gain and low noise. I still run W7IUV preamps on my K9AY loops as well as some other RX antennas though have been thinking about changing one out for a Norton type. Bill VE3NH _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: HMC580 instead of W7IUV preamp
That's amazing. But where did you get it? Mouser is sold out, 390 on order, but no estimated delivery date. 73, Mike www.w0btu.com On Fri, Aug 28, 2015 at 5:26 PM, Richard (Rick) Karlquist rich...@karlquist.com wrote: It might be a lot easier to simply buy this amplifier IC: http://www.hittite.com/products/view.html/view/HMC580ST89 The specs are close to the W7IUV preamp. I mounted one of these ICs on a breadboard and tried it out with a short vertical whip and it seemed to work fine. _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: HMC580 instead of W7IUV preamp
DigiKey has some... HMC580ST89ETR Analog Devices Inc | 1127-1059-1-ND | DigiKey | | | | | | | | | | | HMC580ST89ETR Analog Devices Inc | 1127-1059-1-ND ...Find Analog Devices Inc HMC580ST89ETR (1127-1059-1-ND) at DigiKey. Check stock and pricing, view product specifications, and order online. | | | | View on www.digikey.com | Preview by Yahoo | | | | | 'JK On Friday, August 28, 2015 3:57 PM, Mike Waters mikew...@gmail.com wrote: That's amazing. But where did you get it? Mouser is sold out, 390 on order, but no estimated delivery date. 73, Mike www.w0btu.com On Fri, Aug 28, 2015 at 5:26 PM, Richard (Rick) Karlquist rich...@karlquist.com wrote: It might be a lot easier to simply buy this amplifier IC: http://www.hittite.com/products/view.html/view/HMC580ST89 The specs are close to the W7IUV preamp. I mounted one of these ICs on a breadboard and tried it out with a short vertical whip and it seemed to work fine. _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Topband: HMC580 instead of W7IUV preamp
Mouser has them in other packaging. http://www.mouser.com/Search/Refine.aspx?Keyword=HMC580ST89ETR Lee K7TJR _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: HMC580 instead of W7IUV preamp
Thanks, Jeff! Much appreciated. Looks like it might be a fun winter project. 73, Mike www.w0btu.com On Fri, Aug 28, 2015 at 6:24 PM, Jeff Kincaid w...@sbcglobal.net wrote: DigiKey has some... HMC580ST89ETR Analog Devices Inc | 1127-1059-1-ND | DigiKey http://www.digikey.com/product-detail/en/HMC580ST89ETR/1127-1059-1-ND/3452200 [image: image] http://www.digikey.com/product-detail/en/HMC580ST89ETR/1127-1059-1-ND/3452200 HMC580ST89ETR Analog Devices Inc | 1127-1059-1-ND ... http://www.digikey.com/product-detail/en/HMC580ST89ETR/1127-1059-1-ND/3452200 Find Analog Devices Inc HMC580ST89ETR (1127-1059-1-ND) at DigiKey. Check stock and pricing, view product specifications, and order online. View on www.digikey.com http://www.digikey.com/product-detail/en/HMC580ST89ETR/1127-1059-1-ND/3452200 Preview by Yahoo 'JK On Friday, August 28, 2015 3:57 PM, Mike Waters mikew...@gmail.com wrote: That's amazing. But where did you get it? Mouser is sold out, 390 on order, but no estimated delivery date. 73, Mike www.w0btu.com On Fri, Aug 28, 2015 at 5:26 PM, Richard (Rick) Karlquist rich...@karlquist.com wrote: It might be a lot easier to simply buy this amplifier IC: http://www.hittite.com/products/view.html/view/HMC580ST89 The specs are close to the W7IUV preamp. I mounted one of these ICs on a breadboard and tried it out with a short vertical whip and it seemed to work fine. _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Topband: HMC580 instead of W7IUV preamp
It might be a lot easier to simply buy this amplifier IC: http://www.hittite.com/products/view.html/view/HMC580ST89 The specs are close to the W7IUV preamp. I mounted one of these ICs on a breadboard and tried it out with a short vertical whip and it seemed to work fine. Rick N6RK On 8/28/2015 2:53 PM, Martin Kratoska wrote: The latest version 6 http://www.okdxf.eu/files/preamp_r60.pdf 73, Martin, OK1RR _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Topband: W7IUV preamp
The latest version 6 http://www.okdxf.eu/files/preamp_r60.pdf 73, Martin, OK1RR _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: RX antenna ???
For everyone who's looking for the W7IUV circuit and info . . . Go to the following website for a company sells a W7IUV pre-amp kit (which I have no experience with) and click on the highlighted Published Plans link in the text to download the full .pdf file that used to be on W7IUV's website. http://www.mtmscientific.com/preamp.html HTH. Jack K2RS On 8/28/2015 1:12 PM, Jeff Kincaid wrote: Now that we've all retested the broken link, does anyone have a copy of the pdf? 'JK _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: Kits 'n Parts Preamp Kit Works!
This is supposed to be a great Norton amp. I have not used it personally but it was previously mentioned in this I group I think. http://www.cliftonlaboratories.com/norton_amplifier.htm#Price_and_Options 73, Larry W6NWS -Original Message- From: Bill Liz Sent: Friday, August 28, 2015 2:15 PM To: topband@contesting.com Subject: Topband: Kits 'n Parts Preamp Kit Works! I built one of these preamps way back when Diz first began offering them. It works great! I also purchased several spare 2N5109 as he had the best price. Again, good transistors. I tested the K ‘n P model preamp which I had built for a friend against a W7IUV which I had built some years before ‘dead bug” style for myself and both showed about the same gain and low noise. I still run W7IUV preamps on my K9AY loops as well as some other RX antennas though have been thinking about changing one out for a Norton type. Bill VE3NH _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: RX antenna ???
Getting back to CO8DM's original question about a preamp to use with a flag. If the receiver noise level pops up and then drops when a receive antenna is connected and then disconnected, then it’s likely that a preamp may not be needed at all. When I first played with a coaxial loop, a preamp was necessary. Since going to a full size flag, I find that I seldom even bother turning on a external preamp. I do have a relatively short coax run of about 75 ft from the flag to the receiver. I’d try the flag first without building/buying a preamp and see how it plays. Steve WB6RSE _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: RX antenna ???
I totally agree with you Steve...i will try the flag first without preamp and see how it play. Actually, i will have a short coax run...about 30 or 40 ft... 73Douglas, CO8DM No creo que haya alguna emoción más intensa para un inventor que ver alguna de sus creaciones funcionando. Esa emoción hace que uno se olvide de comer, de dormir, de todo. - Nikola Tesla - Original Message - From: wb6r...@mac.com To: Top Band List List topband@contesting.com Sent: Friday, August 28, 2015 8:03 PM Subject: Re: Topband: RX antenna ??? Getting back to CO8DM's original question about a preamp to use with a flag. If the receiver noise level pops up and then drops when a receive antenna is connected and then disconnected, then it’s likely that a preamp may not be needed at all. When I first played with a coaxial loop, a preamp was necessary. Since going to a full size flag, I find that I seldom even bother turning on a external preamp. I do have a relatively short coax run of about 75 ft from the flag to the receiver. I’d try the flag first without building/buying a preamp and see how it plays. Steve WB6RSE _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
