tag:blogger.com,1999:blog-513094667326816455.post3923125594537721146..comments2023-06-01T08:28:20.863+01:00Comments on M1KTA's QRP ham radio blog: EnsembleTRX PTTUnknownnoreply@blogger.comBlogger2125tag:blogger.com,1999:blog-513094667326816455.post-89595023076343268112010-04-04T10:33:16.715+01:002010-04-04T10:33:16.715+01:00OK the other BS170 are fine. I checked the others ...OK the other BS170 are fine. I checked the others and couple were duff so grabbed a bunch bought from jabdog a while back and replaced the duff ones.<br /><br />I put R36 back in place and on PTT Q9 and Q11 do as they are supposed to and Pin 1 & 15 on U10 go high... thanks for that.M1KTAhttps://www.blogger.com/profile/05944098903387301523noreply@blogger.comtag:blogger.com,1999:blog-513094667326816455.post-78849865643983096802010-04-04T10:04:48.171+01:002010-04-04T10:04:48.171+01:00Yes Q10 was duff. ESD?
Replaced now I get RX ant ...Yes Q10 was duff. ESD?<br /><br />Replaced now I get RX ant switching.<br /><br />The oms across Q10 on PTT off is very low, PTT on is very high.<br /><br />Now to work out the truth table for Q9 and Q11 to see if they are also duff.M1KTAhttps://www.blogger.com/profile/05944098903387301523noreply@blogger.com