Path: utzoo!utgpu!ugw.utcs.utoronto.ca!CUVMA!SWL-L Date: Thu, 11 Jan 90 13:21:40 EST Reply-To: Joel B Levin Sender: Short Wave Listener's List Comments: Warning -- original Sender: tag was From: Joel B Levin Subject: Re: Tips for connecting VOX recorder to a receiver X-To: swl-l@cuvmb.cc.columbia.edu To: UofToronto LAN redistribution Message-ID: <90Jan11.143001est.58686@ugw.utcs.utoronto.ca> Newsgroups: bitnet.swl-l Distribution: ut Approved: devnull@gpu.utcs.toronto.edu In article <12520@cbnewse.ATT.COM> parnass@cbnewse.ATT.COM (Bob Parnass, AJ9S) writes: | |I think those reporting "hum" problems when the CTR-82 is |powered by the AC wall adapter are experiencing a "ground |loop" condition. This is not a fault of the recorder itself, |rather a system problem that can happen whenever an AC powered |recorder is connected to an AC powered radio. | |It happened with my CTR-75s until I connected them properly. | |Perhaps a repost of this older article will help you |interface the CTR-82. . . . I didn't see anything that would say how to correctly eliminate the ground loop. Anyhow, I think I'm having a different problem. I saw the note about the sale on CTR-82s and went out and got one. I get power from an old Archer (R.Shack) universal adapter set to 6 volts. I connect its AUX jack (chosen after experimenting) to the earphone jack on my old Regency scanner (I don't recall the model, it was maybe the first 10-channel programmable they sold, at least 7 years old). So far, so good. But after recording maybe half a cassette (a C-90 if it matters), the cutout stopped cutting out; or rather the machine would sort of half-stop, and run at variable speeds 1/4 to 1/2 normal, operating normally whenever a real signal from the scanner came in. This behavior seemed to get worse, and also occurred even with a dummy plug in the mic jack! I took the machine back to RS the next day and swapped it for a new one. The new one shows the same behavior. The design of the think may be half-assed. It seems as if the cut-out mechanism is analog in some sense -- the machine seems to fade off instead of being switched off. Before I take this one back, either for one more exchange or for a refund, I'll make sure my 6 volts is exactly that, and see if there is anything else obviously wrong. If anyone knows what's going on please let me know. /JBL (Bob, I'd love to get hold of the information about reducing the cutoff time from ~5 seconds to <2, if there's a convenient way for that to happen. Thanks) = Nets: levin@bbn.com | "There were sweetheart roses on Yancey Wilmerding's or {...}!bbn!levin | bureau that morning. Wide-eyed and distraught, she POTS: (617)873-3463 | stood with all her faculties rooted to the floor."