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Amplifier Talk- Communications Concepts
Well Ashar I plugged KL203 and not bad. Not the best but works. I need to mod KL203 to expand the power range; on 20m, it was good no issues. Sajid
Well Ashar I plugged KL203 and not bad. Not the best but works. I need to mod KL203 to expand the power range; on 20m, it was good no issues. Sajid
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By
Sajid Rahum
· #71887
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Compliance Summary - other radios
Hi Allison, i did get the prebuilt band pass filter from ebay. Wondering if you have any suggestions to mod the KL-203 as well as how to mod it to be more sensistive to lower power e.g. from softrock
Hi Allison, i did get the prebuilt band pass filter from ebay. Wondering if you have any suggestions to mod the KL-203 as well as how to mod it to be more sensistive to lower power e.g. from softrock
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Sajid Rahum
· #71864
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CB amplifiers RM-Italy KL203P
I did get the KL203; not bad of course low pass filtering is required. It works with 20m up. power mod is required and will make it once i get the caps 1200pf/50v for C14. For softrock no lock; SSB ou
I did get the KL203; not bad of course low pass filtering is required. It works with 20m up. power mod is required and will make it once i get the caps 1200pf/50v for C14. For softrock no lock; SSB ou
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By
Sajid Rahum
· #71863
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BITX shoes?
Yes agreed. I got it but no luck - the power from softrock is too low to trigger the amp to transmit. Not sure if anyone knows how to mod it. If I use AM, it does trigger the amp. Sajid
Yes agreed. I got it but no luck - the power from softrock is too low to trigger the amp to transmit. Not sure if anyone knows how to mod it. If I use AM, it does trigger the amp. Sajid
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By
Sajid Rahum
· #71862
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BITX shoes?
I ordered RMItaly KL203 and will give it a short to work with ubitx once it arrives here.
I ordered RMItaly KL203 and will give it a short to work with ubitx once it arrives here.
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By
Sajid Rahum
· #71641
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LinAmp
All building the 70w/ssb amp with the 100w lpf from ebay as noted earlier. for R6 if someone did that mod based on the german station
All building the 70w/ssb amp with the 100w lpf from ebay as noted earlier. for R6 if someone did that mod based on the german station
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Sajid Rahum
· #70089
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uBitx 1st contacts
#ubitx
#nextion
Superb. Is this with v5 or other. i finally got my 1st QSO to mid NY from Toronto with v2.0 on 40m.
Superb. Is this with v5 or other. i finally got my 1st QSO to mid NY from Toronto with v2.0 on 40m.
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By
Sajid Rahum
· #69774
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External Amp
Hi Richie Were you able to get the 22ohm 1 watt resistor added? can you share the exact place you soldered over from the gate to target solder point. That is where it is not clear. Sajid
Hi Richie Were you able to get the 22ohm 1 watt resistor added? can you share the exact place you soldered over from the gate to target solder point. That is where it is not clear. Sajid
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By
Sajid Rahum
· #69690
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Oscillation problems Bitx20a
Hi Howard. I am about to start building the minipa70 kit; have ordered also irf520s. any pictures on how to mount them will be helpful. I did found the video below very helpful but he skips on the mou
Hi Howard. I am about to start building the minipa70 kit; have ordered also irf520s. any pictures on how to mount them will be helpful. I did found the video below very helpful but he skips on the mou
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By
Sajid Rahum
· #69688
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ubitx 2.0 - Mic cannot get to TX
mic: Updated the R63 with a 10ohm in parallel. at least no need to shout for now. will try next to improve the mic with a compressor/amp replacing the speaker in the case.
mic: Updated the R63 with a 10ohm in parallel. at least no need to shout for now. will try next to improve the mic with a compressor/amp replacing the speaker in the case.
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By
Sajid Rahum
· #69557
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Audio - R63 mod v2.0
i went ahead and mod'ed it with 10ohm in parallel. Improvement is there; i dont need to shout loud. Best thing is to get the 70w/ssb kit going.
i went ahead and mod'ed it with 10ohm in parallel. Improvement is there; i dont need to shout loud. Best thing is to get the 70w/ssb kit going.
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By
Sajid Rahum
· #69555
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Audio - R63 mod v2.0
I am going to mod the R63 resistor which is 100k in v2 board. Any suggestion what is target value? 10k? or 25k? I will hook up a parallel resistor to get the new value.
I am going to mod the R63 resistor which is 100k in v2 board. Any suggestion what is target value? 10k? or 25k? I will hook up a parallel resistor to get the new value.
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By
Sajid Rahum
· #69523
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ubitx 2.0 - Mic cannot get to TX
All sorted out. my goodness. Here goes for those wanting to use Baofeng. First there are tonnes of 'Baofeng' knockoffs. Now, i dropped out the wiring and replaced it using a ethernet cable which a rol
All sorted out. my goodness. Here goes for those wanting to use Baofeng. First there are tonnes of 'Baofeng' knockoffs. Now, i dropped out the wiring and replaced it using a ethernet cable which a rol
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By
Sajid Rahum
· #69419
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ubitx 2.0 - Mic cannot get to TX
Ok. Vs the mono plug - i used the stereo 3 pin. A B C ------|---|------------\ | | \ ------|---|------------/ From the 2 pin electret: - one goes to ground A (one that has 3 traces on base of electret
Ok. Vs the mono plug - i used the stereo 3 pin. A B C ------|---|------------\ | | \ ------|---|------------/ From the 2 pin electret: - one goes to ground A (one that has 3 traces on base of electret
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By
Sajid Rahum
· #69397
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ubitx 2.0 - Mic cannot get to TX
Next - I took the electrect and wired it to a mono plug. Basic switch in between to test if it would engage TX- no luck; however if I start to pull the plug out I start seeing the clicking of tx. That
Next - I took the electrect and wired it to a mono plug. Basic switch in between to test if it would engage TX- no luck; however if I start to pull the plug out I start seeing the clicking of tx. That
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By
Sajid Rahum
· #69381
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ubitx 2.0 - Mic cannot get to TX
All.finally constructed the ubitx 2.0. Receive is perfect with NJM audio chip. I am struggling to get it to TX. Attached is my diagram for the plug: Blue going to the neck. purple to top most lug to t
All.finally constructed the ubitx 2.0. Receive is perfect with NJM audio chip. I am struggling to get it to TX. Attached is my diagram for the plug: Blue going to the neck. purple to top most lug to t
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By
Sajid Rahum
· #69380
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Ubitx (2.0) - Screen too bright - cannot see when seeing straight
Perfect. it did the trick. Appreciate all. Now the next problem - cannot get the mic going. Opening a seperate thread.
Perfect. it did the trick. Appreciate all. Now the next problem - cannot get the mic going. Opening a seperate thread.
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By
Sajid Rahum
· #69379
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Audio chip burn out.
Hi Graham NJM 2073 did the trick for me; the output is very good and very loud.
Hi Graham NJM 2073 did the trick for me; the output is very good and very loud.
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Sajid Rahum
· #69347
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Any gotchas replacing the TDA2822 with an LM386?
#ubitx
#ubitx-help
I was able to use finally the NJM without issues; audio is really strong with the v2 model.
I was able to use finally the NJM without issues; audio is really strong with the v2 model.
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By
Sajid Rahum
· #69346
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Ubitx (2.0) - Screen too bright - cannot see when seeing straight
Thank you Skip. I will let you know this evening. Much appreciated. Fingers crossed on the mic side; I used the banggood box to put it in. Cutting etc took most of the hours; the rest was fairly strai
Thank you Skip. I will let you know this evening. Much appreciated. Fingers crossed on the mic side; I used the banggood box to put it in. Cutting etc took most of the hours; the rest was fairly strai
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By
Sajid Rahum
· #69345
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