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ID-1 power adjustments
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I have four ID-1 radios and since I have purchased a Bird 10K 10watt, 1.1 to 1.6 Ghz slug, I have found the high power output to range from 3 to 6 watts on each radio.(not even advertised power).
I have heard that there are directions available on how to adjust the power output and also that the radios are capable of power up to 20 watts. Any information about this would be appreciated. I have tried to research passed posting and couldn't find anything on this issue. 73, Paul, KJ4G |
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Just curious... What sort of load are you going into? What type of connectors on the Bird and load? Are you measuring any reflected power from the load?
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Arnold KQ6DI ----- Original Message -----
From: "kj4g" <pauleakin@...> To: <D-STAR_23cm@...> Sent: Sunday, November 14, 2010 9:43 AM Subject: [D-STAR_23cm] ID-1 power adjustments I have four ID-1 radios and since I have purchased a Bird 10K 10watt, 1.1 to 1.6 Ghz slug, I have found the high power output to range from 3 to 6 watts on each radio.(not even advertised power). |
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I suppose one other question is What DC voltage are you providing the radio? 12.0 V, 12.6 V, or 13.8 V? The radio is specified at 13.8 V.
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All of my questions might not make any difference, but it might help someone answer your power questions. Arnold KQ6DI ----- Original Message ----- |
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Another matter to consider, in fact one of the most important, is the cable(s) used to connect raio to bird to load. ? I have seen apparent loss of power due to cables / connectors. ? ----- Original Message ----- From: "Arnold Harding" To: "D-STAR 23cm" Sent: Sunday, November 14, 2010 10:43:48 AM Subject: Re: [D-STAR_23cm] ID-1 power adjustments Just curious... ?What sort of load are you going into? ?What type of connectors on the Bird and load? ?Are you measuring any reflected power from the load? Arnold KQ6DI ----- Original Message ----- From: "kj4g" To: Sent: Sunday, November 14, 2010 9:43 AM Subject: [D-STAR_23cm] ID-1 power adjustments >I have four ID-1 radios and since I have purchased a Bird 10K 10watt, >1.1 to 1.6 Ghz slug, I have found the high power output to range from >3 to 6 watts on each radio.(not even advertised power). > I have heard that there are directions available on how to adjust > the power output and also that the radios are capable of power up to > 20 watts. > Any information about this would be appreciated. I have tried to > research passed posting and couldn't find anything on this issue. > 73, > Paul, KJ4G > ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: ?? ?http://groups.yahoo.com/group/D-STAR_23cm/ <*> Your email settings: ?? ?Individual Email | Traditional <*> To change settings online go to: ?? ?http://groups.yahoo.com/group/D-STAR_23cm/join ?? ?(Yahoo! ID required) <*> To change settings via email: ?? ?D-STAR_23cm-digest@... ?? ?D-STAR_23cm-fullfeatured@... <*> To unsubscribe from this group, send an email to: ?? ?D-STAR_23cm-unsubscribe@... <*> Your use of Yahoo! Groups is subject to: ?? ?http://docs.yahoo.com/info/terms/ |
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Hi Paul,
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I am sure you know this, but I will state it anyway- the power out of the radio is rated into a 50 ohm load. If you are not using a dummy load to determine your output power, you are probably only reading the forward power. The reflected power can be checked by first ensuring you are in RX mode on the transceiver, then rotate the slug so it points opposite the load (make sure the slug is rotated all the way so the arrow is fully rotated 1/2 turn), then transmit and read the reflected power. The total power out of the radio is the forward power, plus the reflected power.? If you are using an antenna while you are making the measurements, be prepared to see the forward/reflected power "dance" around- that is the antenna and/or trees in the near vicinity moving, and changing the loading of the antenna. If you have vertical structures within 10-30 feet or so of the antenna, they can be inducing reflected waves back through the antenna, and through the watt meter.? The only good way to test the radio is to hook it to a dummy load with sufficient capacity to maintain the 50 ohm impedance while you are checking and adjusting the radio.? While you may be able to run the radio at higher power (over the 10 Watts specified), you will most certainly reduce the service life of the output transistor, and perhaps some of the components in the output matching network (check the schematic for part numbers of the subject parts and check their ratings). A good rule of thumb is to 50% de-rate the parts- want 20 Watt capability?- replace any part that isn't rated 40 Watts or above (many parts will be rated in voltage/current values, so develop the wattage capacity from those values). I hope this helps. Regards, Shane? KE7TR On Nov 14, 2010, at 10:43 AM, kj4g wrote:
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Also should have N connectors on the Bird. Dummy load should also be rated for 1.2 g. Every little thing matters at that frequency. Some coax will not even work. Adapters are a no, no. Pl-259 are iffy, non teflon ones probably wont work. Dale ----- Original Message ----- From: n7qor@... To: "D-STAR 23cm" Sent: Sunday, November 14, 2010 3:25:40 PM Subject: Re: [D-STAR_23cm] ID-1 power adjustments ? Another matter to consider, in fact one of the most important, is the cable(s) used to connect raio to bird to load. ? I have seen apparent loss of power due to cables / connectors. ?
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Evans F. Mitchell; KD4EFM / WQFK-894
¿ªÔÆÌåÓýPaul, if you still have a copy of the CD I made about a year
ago
you will find the service manual for the ID-1 on it, if not,
let me
know and I will get it emailed to you....
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Evans F. Mitchell ? From: D-STAR_23cm@... [mailto:D-STAR_23cm@...] On Behalf Of kj4g Sent: Sunday, November 14, 2010 12:43 PM To: D-STAR_23cm@... Subject: [D-STAR_23cm] ID-1 power adjustments I have four ID-1 radios and since I have purchased a Bird 10K 10watt, 1.1 to
1.6 Ghz slug, I have found the high power output to range from 3 to 6 watts on
each radio.(not even advertised power). |