Re: [Repeater-Builder] spare parts for TAIT repeater
Hi Andreas, Lots of these linear type power supplies floating around NZ, but the freight would be prohibitive. If the primary is open circuited, this could just be microtemp that has gone open CCT, and are usually found lying between the outer winding and the outer wax paper layer covering the windings. Cheers Gareth Bennett
Re: [Repeater-Builder] Re: Sorta OT: Looking for a couple of items
On 3/14/2010 11:41 PM, Paul Plack wrote: How do these transmitters play at crowded sites? I've heard some accounts of broadband noise problems for other tenants when high-power Glenayre equipment went in... 73, Paul, AE4KR Having worked on them for over 10 years now, I can say they are very clean-when installed properly-just like most any other brand. Frankly, in the paging industry, the Nucleus has a much worse rep then the Glenayres, especially the 8500/8600 series-probably just about the best paging transmitter made. I can say that the problems you have heard can be attributed to a few causes: -Poor installation, including improperly installed hardline connectors, or not properly weatherproofed, which once water gets in, it can cause IM. -IM generated from sources outside the transmitter -On occasion, the DSP exciters could go 'squirrely' and go into a failure mode that makes a lot of noise. It shouldn't go on long, because it will also affect paging in the area, as the digital waveform gets distorted too. -Digital modulation is always going to be somewhat dirtier then analog, and requires proper 'clean-up' so to speak. The Glenayre 900 MHz transmitters all came with a circulator, or at least a BP cavity on the lower power stations. Not all Nucs have one. - Original Message - From: Joe To: Repeater-Builder@yahoogroups.com Sent: Sunday, March 14, 2010 8:59 PM Subject: Re: [Repeater-Builder] Re: Sorta OT: Looking for a couple of items I maintained a 900MHz Glenarye digital simulcast system here in Connecticut years ago and played with the analog mode, it worked nice...
[Repeater-Builder] Old Motrac receiver splitter
Anybody ever used one of these, TLD8210A and if so how well did they work and what were the losses encountered. They have a coil and a cap for tuning? Thanks: Chuck
[Repeater-Builder] Re: OT: If you are a Windows XP or 2000 user you might find this interesting...
maybe the difference in unformatted and formated is the difference the current size is 512 byte sectors ? what is ntfs format compared to ? certainly the ram drives would need some kind of emulation or a whole new operating system DRAM based solid-state drives are especially useful on computers that already have the maximum amount of supported RAM. For example, some computer systems built on the x86-32 architecture can effectively be extended beyond the 4 GB limit by putting the paging file or swap file on a SSD. Owing to the bandwidth bottleneck of the bus they connect to, DRAM SSDs cannot read and write data as fast as main RAM can, but they are far faster than any mechanical hard drive. Placing the swap/scratch files on a RAM SSD, as opposed to a traditional hard drive, therefore can increase performance significantly. Versions of Windows prior to Windows 7 are optimized for hard disk drives rather than SSDs.[51][52] Windows Vista includes ReadyBoost to exploit characteristics of USB-connected flash devices. Windows 7 is optimized for SSDs[53][54] as well as for hard disks. It includes support for the TRIM command. Microsoft's exFAT file system is optimized for SSDs.[55] According to Microsoft, The exFAT file system driver adds increased compatibility with flash media. This includes the following capabilities: Alignment of file system metadata on optimal write boundaries of the device; Alignment of the cluster heap on optimal write boundaries of the device.[56] Support for the new file system is included with Vista Service Pack 1 and Windows 7 and is available as an optional update for Windows XP.[56 --- In Repeater-Builder@yahoogroups.com, Derek J. Lassen xl198c...@... wrote: That is 512 bytes / sector = 4096 bytes / sector. At 04:30 3/15/2010 +, you wrote: good article kudos for that people are dropping 400 dollars for the solid state drives needless to say vista is nanny software at the point where xp 32 or 64 becomes more trouble than it is worth that will be the point where i buy new hardware and a new op its amazing how many people have hardware that was never backward or forward compatible or upgradeable 400k sectors and a translation to 512k sectors sounds like the ram hard drives to me --- In mailto:Repeater-Builder%40yahoogroups.comRepeater-Builder@yahoogroups.com, Mike Morris WA6ILQ wa6ilq@ wrote: The hard drive manufacturers are changing the native drive sector size... industry wide. Since XP and 2000 are frozen (no more major updates) they are going to take a performance hit. See http://www.dailytech.com/HDD+Makers+Adopt+Improved+Storage+Format+Windows+XP+Users+Beware/article17869.htmhttp://www.dailytech.com/HDD+Makers+Adopt+Improved+Storage+Format+Windows+XP+Users+Beware/article17869.htm A lot of the comments at the bottom go off on tangents, but the article at the top is worth reading. Mike WA6ILQ
[Repeater-Builder] Inexpensive return loss bridge
Rick at Amtronix is now selling a bargain-priced return loss bridge - $69 kit, $109 assembled and tested. Covers 400 kHz to 1 GHz. Directivity spec is 30 dB. No, it doesn't turn your TG/SA into a $50k VNA, but for a little over a Franklin, it looks like quite a deal. Details and specs on Amtronix web site (www.amtronix.com). I haven't used one, so I have no comment on its performance, just passing along the info. --- Jeff WN3A
Re: [Repeater-Builder] OT: If you are a Windows XP or 2000 user you might find this interesting...
At 3/13/2010 11:54, you wrote: The hard drive manufacturers are changing the native drive sector size... industry wide. Since XP and 2000 are frozen (no more major updates) they are going to take a performance hit. See http://www.dailytech.com/HDD+Makers+Adopt+Improved+Storage+Format+Windows+XP+Users+Beware/article17869.htm If the performance degradation ends up being significant, don't be surprised to see 3rd party native support for the 4k block size appear, similar to the non-Microsoft USB drivers for NT 4.0. Bob NO6B
[Repeater-Builder] OT: Programming Icom IC-U810T
I have come across an Icom IC-U810T LTR trunking radio and I haven't been able to find any info on how to program it. If anyone has any info on this, please email me off list. Thanks, Eric.
[Repeater-Builder] Maxon sm4450ne
Hi guys .I have a sm4450ne and I am having problems with setting it up for 507 and 517 mhz .I have set 2 up till now and they are working fine except these NE are having problems with the vco lock error 3 .I am wondering if anyone can shed some light .I can set it up for rx on 507 but it wont lock on transmitt. Thank You ,Ian Wells Kerinvale Comaudio, 361 Camboon road, Biloela.4715 Ph 0749922449 Mb 0409159932 Hm 0749922574 Fx 0749922767 www.kerinvalecomaudio.com.au faint_grain.jpg
