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Tony Parks
Hi Stan,
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After building over forty of the little SoftRock receivers I have seen what you are talking about several times. With no signal at all getting through, it usually is associated with the oscillator signal not being divided down to clock the QSD quad switch. Check carefully for open pins on the IC's and solder bridges between IC pins. Most of the time when a SoftRock does not play right for me it is associated with a soldering problem. The usual things of making sure the right components are in the right locations is fundamental. Also check IC orientation. U1 for example has its pin 1 in the lower left corner of the IC when the printing on the IC reads upright from left to right. One time with no signal getting thourgh I had a bad crystal which may have gone bad by too much heat in soldering the grounding wire to the crystal case. Another time with no signal getting through the coax connector on the end of the antenna coax had an internal short. On the plus side, all SoftRock40 units I have built have worked properly, some with extra effort, with a baseline noise level of about -137 dBm when the unit is calibrated for S9 (50 uV RMS) at -73 dBm. I would be happy to chat on the phone with you if you would like additional help. 73, Tony KB9YIG ----- Original Message -----
From: "Stan Rife" <srife@...> To: <softrock40@...> Sent: Thursday, September 29, 2005 10:12 AM Subject: [softrock40] Not working: HELP I finished the SoftRock last night and I plugged it in to one of my |
