tag:blogger.com,1999:blog-35901825.post1865007729224060020..comments2024-03-19T06:03:40.451+10:00Comments on marxy's musing on technology: Micro Mountaineer 40m Xtal locked CW transceiver reviewPeter Markshttp://www.blogger.com/profile/13007012724570360389noreply@blogger.comBlogger6125tag:blogger.com,1999:blog-35901825.post-73969599485620557072021-05-30T02:46:39.175+10:002021-05-30T02:46:39.175+10:00Can you email me the schematic please? I built th...Can you email me the schematic please? I built the Chinese version of this kit. I think it is nearly identical. They even include the same trim pot for frequency adjustment that is in your kit by mistake because they moved W1 to the front panel with a larger pot. It includes a case. The receiver and side tone is the best that I have used of this type of radio. I found a mod here to make it kq6uphttps://www.blogger.com/profile/14820247852120894180noreply@blogger.comtag:blogger.com,1999:blog-35901825.post-23533758633526528012021-05-11T02:17:41.094+10:002021-05-11T02:17:41.094+10:00The rig is a little disappointing on TX: output po...The rig is a little disappointing on TX: output power is less than 0.3W and drops down while keying. This is because Q6 has the emitter directly connected to ground, with no limiting resistor (47-100 ohm) parallel to a 100nF capacitor (see all other schematics). So, Q6 heats up quickly. I replaced it with 2n2222 and it was worse. I also replaced Q5 with BD139 and I got 0.5W with 12V. No better. High Groundhttps://www.blogger.com/profile/01282597244473444116noreply@blogger.comtag:blogger.com,1999:blog-35901825.post-19257308404763134642021-04-09T02:09:33.954+10:002021-04-09T02:09:33.954+10:00Bill, it would have been 13.8VBill, it would have been 13.8VPeter Markshttps://www.blogger.com/profile/13007012724570360389noreply@blogger.comtag:blogger.com,1999:blog-35901825.post-7536674274126655502021-04-08T21:06:58.223+10:002021-04-08T21:06:58.223+10:00Just finished a build , very low power output , di...Just finished a build , very low power output , did you ground the crystals ? What voltage are you running it on ??<br /><br />Billhttps://www.blogger.com/profile/14806214422657656212noreply@blogger.comtag:blogger.com,1999:blog-35901825.post-30174546865169632932020-10-18T06:49:11.849+10:002020-10-18T06:49:11.849+10:00Thanks John, updated. Of course! I should have rea...Thanks John, updated. Of course! I should have realised that. Unfortunately his page about it is no longer up. I will try to find it in the internet archive and link to it.Peter Markshttps://www.blogger.com/profile/13007012724570360389noreply@blogger.comtag:blogger.com,1999:blog-35901825.post-19012739502206068492020-10-17T23:38:52.719+10:002020-10-17T23:38:52.719+10:00Credit should go to W7ZOI, not ZOL. More info abou...Credit should go to W7ZOI, not ZOL. More info about this design can be found on his website.John AE5Xhttps://www.blogger.com/profile/06884676867006975179noreply@blogger.com