tag:blogger.com,1999:blog-17729900.comments2024-01-12T09:19:49.871-07:00KD7LRJ BlogAnonymoushttp://www.blogger.com/profile/05655521621851084417noreply@blogger.comBlogger53125tag:blogger.com,1999:blog-17729900.post-29114442095705274752017-08-25T03:52:37.236-06:002017-08-25T03:52:37.236-06:00Nice write up. I have a UV5R + Plus and love it...Nice write up. I have a UV5R + Plus and love it. Same firmware version. But I bought mine from Ebay for $25.00 free shipping. They have extra batteries for 2 for $12.00. Bought some of them too. Love the dual watch feature and the easy programming with chirp! Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-17729900.post-75365292587206703782017-08-19T05:29:34.496-06:002017-08-19T05:29:34.496-06:00The capacitor will block DC from the transformer; ...The capacitor will block DC from the transformer; most mic inputs expect an electret mic in a headset or speaker-mic, which needs some +5..8VDC for the MOSFET amplifier at the mic. The 10kOhm resistor (especially the adjustable potentiometer) can set the level into the mic jack/'TX Audio' to a lower level. If you find a level you like and don't need to set it for more than one radio/laptop combo, use a pair of appropriate resistor values as a Voltage Divider to cut it down to size. 'Season to taste' or 'Adjust in Test'. The cap then connects to the junction of the two resistors.<br />Personally I like the little trimpots for PCBs, with a screwdriver slot.<br />I'm building such an interface based on the CATbox with a MAX232 chip to level-shift an EIA-232 port (+/-12V) to older radios (0..5V TTL levels) so I can also do full CAT (Computer Aided Tuning) between the big FT-767GX and computer, with the transformers to isolate audio grounds, as here.WA6DZShttps://www.blogger.com/profile/00961329545894835818noreply@blogger.comtag:blogger.com,1999:blog-17729900.post-19410031127220870462017-02-09T11:26:58.022-07:002017-02-09T11:26:58.022-07:00The schematic shows a variable resistor but I used...The schematic shows a variable resistor but I used a fixed one and connected the capacitor's negative lead to the transformer output.<br /><br /> 10uf <br />Soundcard output o----{xfmr}----o-----]|+-----o to tx audio<br /> }||{ | <br /> }||{ ~ 10K resister<br /> }||{ | <br /> Computer ground o----{xfmr}----o-------------o to radio groundAnonymoushttps://www.blogger.com/profile/05655521621851084417noreply@blogger.comtag:blogger.com,1999:blog-17729900.post-65623126019543120512017-02-09T09:17:11.881-07:002017-02-09T09:17:11.881-07:00I'm a little confused about the capacitor conn...I'm a little confused about the capacitor connection. Is the negative simply sent to ground or somehow connected to the resistor?<br />The Prepared Canadianhttps://www.blogger.com/profile/10747226068943215809noreply@blogger.comtag:blogger.com,1999:blog-17729900.post-9854632302973537902016-08-31T03:09:34.502-06:002016-08-31T03:09:34.502-06:00How did you wire up the 3.5mm jacks that connect t...How did you wire up the 3.5mm jacks that connect to the USB sound card?K4KYDhttp://www.k4kyd.comnoreply@blogger.comtag:blogger.com,1999:blog-17729900.post-77487901391625886292016-08-31T03:08:19.740-06:002016-08-31T03:08:19.740-06:00How did you wire up the 3.5mm jacks that go to the...How did you wire up the 3.5mm jacks that go to the USB sound card?Anonymoushttps://www.blogger.com/profile/12000882562176944968noreply@blogger.comtag:blogger.com,1999:blog-17729900.post-4648426164254255932016-04-13T14:07:29.743-06:002016-04-13T14:07:29.743-06:00You didnt explain why you needed to create the iso...You didnt explain why you needed to create the isolation circuit. What the purpose? was it to improve the audio out of the baofeng so you can decode better, I know these radios have problems with the song quality coming out and it makes it hard to decode. Or was it for because the device you were hooking both inputs to would ground both mic and speaker connects which would cause PTT to activate.KD2NFChttps://www.blogger.com/profile/17100320005764047068noreply@blogger.comtag:blogger.com,1999:blog-17729900.post-89625854900562823502015-12-15T07:17:43.094-07:002015-12-15T07:17:43.094-07:00OMG! It is so awful. In fact, I have never thought...OMG! It is so awful. In fact, I have never thought that something like this happened with laptop. In my case because of overvoltage was damaged my adapter hardware.be/power-supply/dell/450-abpi.html. I was so pity, I've just bought it, but then my friend told me that it is happening very often if something wrong with wiring!Anonymoushttps://www.blogger.com/profile/09987717072528112465noreply@blogger.comtag:blogger.com,1999:blog-17729900.post-39399289193567473472015-12-02T08:39:57.772-07:002015-12-02T08:39:57.772-07:00Many new smoke alarms are coming with sealed batte...Many new smoke alarms are coming with sealed batteries that last 10 years. Here's one: http://www.amazon.com/Kidde-Sealed-Lithium-Battery-Operated/dp/B00PC5SX98<br /><br />Some US states have even passed legislation requiring smoke alarms with non-replaceable batteries: https://www.nema.org/news/Pages/Understanding-State-Mandates-for-10-year-Batteries-in-Smoke-Alarms.aspxAnonymoushttps://www.blogger.com/profile/05655521621851084417noreply@blogger.comtag:blogger.com,1999:blog-17729900.post-59650075463704984852015-12-02T02:38:20.297-07:002015-12-02T02:38:20.297-07:00If I am not mistaken, you should replace battery a...If I am not mistaken, you should replace battery at smoke detector every year. Even if it has never been used! I bought not expensive smoke detector hardware.be/rookmelder/hager/tg511a.html but it has small lamp that shows when it is time for changing battery! ! <br />Anonymoushttps://www.blogger.com/profile/09987717072528112465noreply@blogger.comtag:blogger.com,1999:blog-17729900.post-55746031877875659142015-11-05T02:45:28.360-07:002015-11-05T02:45:28.360-07:00Hi,
Thank you for this article. Very interesting a...Hi,<br />Thank you for this article. Very interesting and I opened a lot of new for myself. I became interesting in self-discharge. Where can i look on it..In my house I use smoke detectors and I should replace battery every year..As I understood from your post that this battery I can remove in 3 or 4 years, yes? And if it is true i want to ask you If it is appropriate for all smoke alarms? For example if I have this one http://hardware.be/rookmelder/hager will it be just right for it?Anonymoushttps://www.blogger.com/profile/09987717072528112465noreply@blogger.comtag:blogger.com,1999:blog-17729900.post-42474835746370639302014-02-03T18:21:11.749-07:002014-02-03T18:21:11.749-07:00So, something I learned today about these units is...So, something I learned today about these units is that I wasn't hooking up the connections to the sound card in the best way. The laptop I was testing them on didn't care which channel the sound came in on and since it also had the "mono" option in Fldigi selected, it heard everything coming in from the radio.<br /><br />I was using the right channel (the tip) when it looks like for most systems, I should have been using either the left channel (ring), or connecting both left and right together. If anyone has received one of these units from me and has had troubles with it, this is a possible reason. It's easy to fix by opening the 3.5mm plugs and soldering the tip & ring connectors together. I've done that starting with the units I finished today. I'll label them Version 1.1 from now on. :)<br /><br />For anyone who has a 1.0 model, I'd be happy to update it for you.<br /><br /> ...DougAnonymoushttps://www.blogger.com/profile/05655521621851084417noreply@blogger.comtag:blogger.com,1999:blog-17729900.post-74081556493728929532014-02-01T22:18:10.657-07:002014-02-01T22:18:10.657-07:00I told some people I would experiment with adding ...I told some people I would experiment with adding a way to listen and talk on the radio without having to remove the plug from the radio (or have two radios). I was hoping that I could use the other part of the headsets I've been hacking the audio cables from. I tried it and it does work, but with one (huge) drawback. The mic is always live. Since we have to use VOX to get the radio to transmit when there is an outgoing signal present, this means that any audio loud enough to trigger the VOX circuit on the radio will cause it to transmit. I suppose this is OK if you are alone in a quiet environment, but that is not likely the case all of the time. The PTT button on the headset still works and you can turn the VOX sensitivity down and make this work better, but it's not something I'm going to recommend.<br /><br />While playing around with this, I discovered (yeah, I'm a little slow I guess) that you can already monitor the sound coming into the computer from the radio (in Windows anyway) by using the "Listen to this device" option on the Listen tab of the Microphone Properties window.<br /><br />So, now you only have to remove the device to transmit (hopefully this occurs less often than listening :)<br /><br /> ...DougAnonymoushttps://www.blogger.com/profile/05655521621851084417noreply@blogger.comtag:blogger.com,1999:blog-17729900.post-37435331459758916172014-01-03T12:13:30.898-07:002014-01-03T12:13:30.898-07:00Thanks Doug,
I just got a UV-5R and found your ide...Thanks Doug,<br />I just got a UV-5R and found your idea, I did mine a bit different, i put the SC connectors on the isolator but left the RCA F conns on. I built the cable from the RCAs to the radio with a little bit of vector board. This way i can build cables for other radios as well and just plug in what i need.<br />It seems to work well but i have not tried it with someone else yet.<br />73<br />Barry<br />NF1ONF1O Barryhttp://qrz.comnoreply@blogger.comtag:blogger.com,1999:blog-17729900.post-49503498807828248822013-11-09T22:10:19.676-07:002013-11-09T22:10:19.676-07:00I think this would be possible if you balance the ...I think this would be possible if you balance the audio levels between the two radios. The line level output of the receiver radio needs to be reduced to be compatible with the microphone level input of the transmitter radio. The resistor and capacitor combination in the interface above do that. You would have to do it in both directions for your project.<br /><br />You'll probably have to use one radio on 2 meters and the other on 70 cm to keep them from interfering with each other making it more of a crossband setup.Anonymoushttps://www.blogger.com/profile/05655521621851084417noreply@blogger.comtag:blogger.com,1999:blog-17729900.post-24643074138837974492013-11-09T18:26:38.152-07:002013-11-09T18:26:38.152-07:00It will be possible to connect a audio cable 2.5mm...It will be possible to connect a audio cable 2.5mm from the speaker jack of a Baofeng UV-5R to the 3.5mm microphone jack of another UV-5R? I'm trying to build a mini tactical repeater with two Baofeng UV-5R. <br /><br />I tried connecting the two (2) Baofeng's UV-5R with a straight 2.5 mm - 3.5mm audio cable, but when I turn up the volume of the radio that function as a receiver (Rx), the radio that function as a transmitter (Tx) stop transmitting or transmit intermittently with a bad audio. <br /><br />Any suggestions? <br /><br />Thanks!Jaime J. Calderínhttps://www.blogger.com/profile/16986155614303703953noreply@blogger.comtag:blogger.com,1999:blog-17729900.post-35228600887889162672013-10-01T21:24:48.099-06:002013-10-01T21:24:48.099-06:00I would like to use NBEMS to communicate with digi...I would like to use NBEMS to communicate with digital signals.Gary Huttonhttps://www.blogger.com/profile/03419240962046195126noreply@blogger.comtag:blogger.com,1999:blog-17729900.post-3784384581627621222013-09-30T08:29:57.778-06:002013-09-30T08:29:57.778-06:00Oops, sorry about the missing second half of the a...Oops, sorry about the missing second half of the article. It's back now.Anonymoushttps://www.blogger.com/profile/05655521621851084417noreply@blogger.comtag:blogger.com,1999:blog-17729900.post-38966579385641217872013-09-14T09:39:54.908-06:002013-09-14T09:39:54.908-06:00Nice write up. I have a UV-5R without the plus tha...Nice write up. I have a UV-5R without the plus that has the same firmware version. Same issues. For $30 (shipped from amazon and received in one day), I think it was a good deal. I have a VX-6R that I use most of the time.<br />Gregghttps://www.blogger.com/profile/11687754678201574439noreply@blogger.comtag:blogger.com,1999:blog-17729900.post-44525803606414222702013-09-14T09:39:41.403-06:002013-09-14T09:39:41.403-06:00Nice write up. I have a UV-5R without the plus tha...Nice write up. I have a UV-5R without the plus that has the same firmware version. Same issues. For $30 (shipped from amazon and received in one day), I think it was a good deal. I have a VX-6R that I use most of the time.<br />Gregghttps://www.blogger.com/profile/11687754678201574439noreply@blogger.comtag:blogger.com,1999:blog-17729900.post-14522232094222560182012-11-15T13:00:24.139-07:002012-11-15T13:00:24.139-07:00My D800's battery blew out, but the laptop act...My D800's battery blew out, but the laptop actually survived. Not exactly portable anymore though. I can still run it of AC, but replacing with another battery is obviously out of the question. That part of the machine is seriously screwed up. The keyboard feels kinda strange now too. It still works but has this 'Crunchy' feel.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-17729900.post-77826421716658987382012-08-31T15:35:18.550-06:002012-08-31T15:35:18.550-06:00Update: Backblaze has been working great for me ov...Update: Backblaze has been working great for me over the past 2 months and I just signed up as an affiliate for them. Yes, I suppose that means I'm not objective anymore. <br /><br /><a href="http://www.backblaze.com/partner/af3404" rel="nofollow">Here's a link</a> that will get me referral credit if you decide to use Backblaze as I have. It's not a big deal because the percentage of your $5 per month payment I would receive isn't a whole lot of money; I just wanted to see if anyone would switch because I shared my experiences here. In case anyone cares, this is my only financial connection to their company (well, that, and I also pay them to safeguard my data).Anonymoushttps://www.blogger.com/profile/05655521621851084417noreply@blogger.comtag:blogger.com,1999:blog-17729900.post-60992289844215623692012-07-13T15:44:53.482-06:002012-07-13T15:44:53.482-06:00Since McPcBackup was NEVER able to run completely ...Since McPcBackup was NEVER able to run completely on my machine, I gave up and switched to my new favorite online backup provider BackBlaze. My first backup of over 600 GB took 12 days to complete (I have a VERY fast connection at home :) and it's been working great ever since.Anonymoushttps://www.blogger.com/profile/05655521621851084417noreply@blogger.comtag:blogger.com,1999:blog-17729900.post-58681847175868066892012-07-13T15:37:45.308-06:002012-07-13T15:37:45.308-06:00This must be one of MyPcBackup's paid promoter...This must be one of MyPcBackup's paid promoters. No user comments are allowed.Anonymoushttps://www.blogger.com/profile/05655521621851084417noreply@blogger.comtag:blogger.com,1999:blog-17729900.post-18207260256243446412012-07-13T04:24:00.427-06:002012-07-13T04:24:00.427-06:00Any way to get our http://online-backup.topfiveawa...Any way to get our http://online-backup.topfiveawards.com/ added to your list?Anonymoushttps://www.blogger.com/profile/06214233603338287958noreply@blogger.com