Darrell Bellerive <[EMAIL PROTECTED]> made an utterance to the drakelist gang ---------------------------------------------------------------------- Last night my Drake 2-B receiver displayed a new problem.
Over a period of a few seconds the normal static and static crashes on 80 metres was supplanted by loud static, which was maintained for several seconds and then over a period of a few more seconds subsided. This whole process repeated a few times. The loud static was smoother than the normal atmospheric static and sounded more like white noise. This loud static or white noise had no static crashes and movement of the preselector did not affect the level. The s-meter followed the level of this noise. The RF and AF gain controls functioned normally as did all other controls on the radio and the 2BQ. The top of the cabinet also felt much hotter than normal particularly over the power transformer side of the cabinet. Since the preselector did not affect the level of the noise, it is unlikely the noise was coming in on the antenna and therefore was generated internally. Looking at the schematic the preselector is on the input side of the RF amp and the s-meter on the output side of the last IF amp, so the problem could be anywhere in between. Any ideas? Another problem I have noticed is that the 'A' band receives 80 meters exactly like the 80 meter band does even though there is no crystal in the 'A' band crystal jack. I suspect that the 80 meter crystal may have been jumpered to the 'A' band crystal jack, but am curious as to why. The receiver seems to function equally well on both bands. I purchased the receiver last September at a hamfest and have not opened up the rig, so have not inspected the crystal area inside the chassis. Other than a bit of hum and a little distortion on AM signals detected on the diode detector, the radio has worked very well. I have been collecting parts to recap the receiver and add the 'A' band to 160 meter mod, test all the tubes, and do a clean up, lube, and realignment. Also possibly do the AF Mod de W7ZFB, and the B&B hum mod. Looks like I will finally have to look under the hood. 73, Darrell -- Darrell Bellerive Amateur Radio Stations VA7TO and VE7CLA Grand Forks, British Columbia, Canada ---------------------------------------------------------------------- Submissions: [EMAIL PROTECTED] Unsubscribe: [EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost: [EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net ----------------------------------------------------------------------
