Ic 7300 average ssb power modification. Also, supply voltage is critical.

Ic 7300 average ssb power modification. Also, supply voltage is critical. e FSK441 and JT6M also are affected) it's the problem of too sharp ALC limiting, making the ALC loop acting too fast Nov 12, 2019 · This video shows how the output power from an IC-7300 overshoots excessively after the ALC mod is applied. Icom IC-7300 wide band modification by PA2DB: Remove bottom and find the diode matrix (near big chip) Open RX 0. Jan 1, 2021 · Kenwood introduced the mod back in the early 90's for customers that wanted to run their hybrid TS-520's/830's, etc. By delaying the ALC action ssb voice has more time to do the job. g. Decrease the power you transmit with. On my IC-7300, the way I know of to read power out is to open up the meter display. I can set the power level so that it doesn't even register on the meter, but I'm still getting spots from across country. txt) or read online for free. In SSB you can guess your duty cycle will be around 20% to average the peaks and valleys of your voice. I have the ALC meter with my settings showing about 65-70% My conclusion is there is absolutely no reason to do the ALC mod everyone is doing, its not necessary, but to each his own. Neal, describe exactly how you adjust your setup. The problem is with the 7300 is, in my opinion, ALC being too aggressive. e. Tested with succe Here's a solution - SSB power increase MOD, born after long hours spent on examining schematic diagrams, comparing circuit details and ham radio cooperation. That is at full carrier, on SSB it seems to perform as expected. CW seems to pop out of the noise better and SSB is more pleasant and interpretable. A. transceivers with low power in the SSB mode. 100W PEP) The IC-7100 has a very "fast" ALC, it acts earlier and voice has no chance to produce much power. The IC-7300 requires 13. However, the low end of the scale on the Po meter is hard to read, even squinting. Its default audio simply sounds fuller–more robust. 5W to 10W average. Use a different transmit mode. Jan 4, 2018 · Here’s a solution – SSB average power (or „talk average power“ ) increase MOD, born after hours spent on examining schematic diagrams, comparing circuit details and ham radio cooperation. 86 KB CURRENT 401XXXXX F7FC Corrects lock up whe Apr 22, 2016 · Output power seems fine and up to specification. Oct 31, 2020 · I repaired enough golden screwdriver mods in ham radios and Cb radios to know the only result of these mods are more expensive work on the workbench. Apr 28, 2018 · Is this also valid when the IC 7300 is in RTTY mode? This weekend I did some RTTY (FSK) using the IC 7300 (in RTTY mode) and MMTTY, single USB-cable, no other (logging) program connected. You can eliminate the need for such a modification if this is done correctly. So, two questions: Is there a better way to read power out? Apr 30, 2018 · It does indicate to have the power at 100% and adjust the TX audio levels to have Zero ALC, the same as in my tutorial. Jan 14, 2018 · If you want to increase your average power output to about 85% of other radios, and still have a clean signal, then all you need to do is rethink a few adjustments. Dropping power from 100 W to 50 W is only 3 dB, which isn't a huge difference. With RF Power set on 30% the ALC was about 3/4 of the scale, so a rather high ALC reading. Other modes give full output, with the power meter on the radio, and on the MFJ tuner showing the same power level. transistors about IMD at specified voltages and output power as well 1 dB compression point effects driving the hell out of them. 030-74. The power meter on the 7300 shows full deflection, however I'm unable to get much more than 60 watts, as measured on my MFJ tuner, regardless of it being set to peak or average. Please perform at your own r Dec 18, 2020 · Trying to use SSB and injecting a tone just confuses the matter and keying the radio in CW often requires an external control of some sort. After a while I noted my average of contacts plumed. 8 volts DC (+/- 15%) at 21 amps in order to produce full rated power output. 05 MB: Icom-IC-7300-hand-microphone-modification: 1. pdf), Text File (. The Excalibur has a better audio profile for AM broadcasters, though. Used to make tons of DX contacts with Flex 3000. . ICOM IC-7300 LOW SSB POWER MODIFICATION by SP3RNZ: 1. (Output reading on my external Kenwood AT-230: about 20 watts). The 21A figure is based on a constant key down, like AM, FM, or a digital mode. The PDF has this, This Guide applies to newer Icom HF radios with a USB interface, such as the IC-7200, IC-7850, IC-7851, IC-7300, IC-7610, IC-7600, and IC-7100. This is modification born after extensive search for reason of low SSB Power in IC-7300 when on SSB or fast modes like FSK441/JT6M and MSK144. IC-7300 SSB TALK POWER MOD Nothing terribly significant here for those that have been using this rig for a while, but it may be helpful for some new owners. Icom Ic-7300 Low Ssb Power Modification by Sp3rnz-1 - Free download as PDF File (. 8Mhz (REMOVE D Kenwood programming software - Reference Chart Kenwood Programing Software FIRMWARE: KDS-100 504XXXXX 4A46 PTT ID Display feature 176. The results of the modification are dramatic, giving a May 15, 2016 · In SSB and CW, the IC-7300 excels, in my opinion. Nov 1, 2017 · Don’t expect the IC-7300 (or any radio) settings to be optimized right out of the box. Modulation drops off at lower or higher output power settings (e. Likewise as in IC-7100 low SSB power ( but not only SSB - i. Testing in an one KW amplifier, my IC-7100 puts 250W when my friend´s IC-706 puts 780W. Average SSB power measured on a general purpose meter is about 50W, so peak is going to be around 100W. This is band specific so has to be done for every band. The audio from the IC-7300 on AM sounded absolutely flat. Use the microphone gain, compressor, and EQ to set up your audio correctly, and tailor it to your voice. This is a quick rundown of In practice as soon as you start talking to the microphone, power output starts increasing and the ALC has to act and control this power to the preset level (i. Feb 15, 2020 · Average SSB power adjustment through service menu. 10 to 16 dB below 100W peak power is 2. Look into the data of the P. I checked it into a dummy load on several meters and it is around 100W on all lower bands and just over 50W on 4m. Very easy. Mar 10, 2019 · Purposely there is NO audio due to problems when recording Icom 7300 Average RF power modification , Just one Tantalum capacitor is all that's needed , I A number of users have commented that the average power output of the IC-7100 on SSB, as measured on a moving coil power meter appears low compared with other transceivers. 14 tested on 100W Spinner dummy load using standard hand Micropohone. I've tried the mod on my IC-756 PRO II, IC-7000 and I think my IC-706MKIIG in the AM mode and never found any real advantage. 55 MB: Sherwood Engineering HF test resultats for RDI - Icom This is a demo on how to adjust the IC-7300 SSB power meter calibration. Oct 13, 2020 · For the average human voice, the ratio voice-peak to average-speech-level is about 10-16 dB. Jan 31, 2017 · Here's a solution - SSB average power (or "talk average power" ) increase MOD, born after hours spent on examining schematic diagrams, comparing circuit details and ham radio cooperation. Checking the SSB power average, is less than half of a friend´s IC-706. , 100%). Having made some bench measurements it would appear that this is not so much a fault but rather a result of the very effective ALC on the radio that prevents it being Nov 27, 2016 · Here You can see two different Icoms IC-7300, both with newest FW 1. The ALC mod is the one published on various sites Internal fuse may cause radio failure on ICOM IC-7300: 13 Mar 2017: 70 Mhz band modification on IC-7300 US version: 31 Jan 2017: IC-7300 low SSB Power modification: 02 May 2016: Allmode TX/RX ore only 60m band on IC-7300: 10 Mar 2016: lcom IC-7300 wide band modification: 08 Mar 2016: Icom IC-7300 Wide Band RX and TX modification: Click here to Flash! I have discovered a trick for the IC-7300 and 7610 on AM -- no modifications required! There seems to be a "sweet spot" where the positive modulation percentage on AM is improved if you adjust the output power to about 60% of maximum. Here's a solution - SSB power increase MOD, born after long hours spent on examining schematic diagrams, comparing circuit details and ham radio cooperation. I sold the Flex and bought the IC-7100 because I would have VHF/UHF/HF and DSTAR. The IC 7300 is rated at 100 watts PEP on SSB. Nov 2, 2012 · Average ssb power is now at 80-90w, peaks are at 105-107w. So a peak-power meter will show 100W out, but your Birds needle does not really swing on a few watts average. Icom Ic-7300 Low Ssb Power Also consider that digital modes are heavier-duty than either SSB or CW, and 50W is a bit of a tall order for a battery in your price-range; you'll need more capacity if you're aiming for something like a 25-50% TX-duty-cycle considering digital modes are generally 100% power consumption during the transmit period, unlike SSB (average-power is Jun 14, 2016 · Testing power on each band before the modification and then testing each band after the modification. Use the "Multi" knob to set it.

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