Result was awesome. This moves the knee of the filter from 5.25mhz to 5.6 mhz. Units in the standard and Pro II are physically a little different, theĬircuit was the same. The manuals and board layouts against each other, and while the filter He came up with a few capacitor changes to alter the upperĮnd of the filter response to fix the problem in the Pro II. Some filter design software, and modeled the 80m filter to see where the Internet had the IC-756 Pro II and modified his for 60m coverage as Iĭid, and had the same problem with low output power. Matrix is setup to use the 80m low pass filter up to 6.0 mhz, where it Otherwise, if your rig is as mine, you won't get a decent audio level on your AM transmission.When I first modified the processor, as I had seen numerous bits around the web for adding 60m, i t worked 'OK',īut would only put out about 50% power on 60m. The ACC1 audio is better, yes, but not so noticeable.īy the way, if you transmit on AM, I suggest to increase R426 to at least 4.7kOkm (in order to get similar TX audio gains on AM and SSB) and to reduce R449 to 7.8KOhm or so (to get full 100% AM modulation depth without reaching the opamp positive output rail). I suggest you do it only if you're comfortable with this level of hacking.Īnyway, with the mod I described you'll get quite some bandwidth just using the front mic connector. I've changed a few components on my rig to get high-fidelity audio though ACC1 and this required to remove the whole board form the rig and change two or three SMD resistors and capacitors. On the MAIN UNIT board there is an opamp (IC503b) which works near saturation and also has some high-pass filtering on it. Just a tip on the ACC1 audio: The rig, as it is, will give you a low audio fidelity through this connector, as it is intended for digital-like signals only. Could someone provide me the info with the right capacitor to use, a pic or diagram of the XLR cable connector made would be appreciated.Īny info or help would be appreciated and gratefully received. 001uf capacitor to use and if you solder one capacitorįor every pin/shield. 001uf capacitors as suggested but not sure I've brought some Starquad Canare cable and XLR connectors as I'm wanting to I've got the DEQ2496 set up, thanks to all the info here and on the web butĬould someone please give me basic starting settings for the MIC2200 if I'm connecting the ibox audio out cable via the back of the Icom through the New set up will be to start with (hope config is right) A speaker driver, a fan, and a transmit/receive switch were added for quiet.
Sounds good and get good reports but need/addicted to the TX/RX Bandwidth 5 inch And 5 inch Nextion Display case new for uBitx. I've got an Icom 756(non pro) to mod to get the voodoo audio.
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