Quito (Ecuador) 28/Nov/2005 20:03 Hi Patrick and Bjarne!
Bjarne is "The World's Northernmost DX-er" and perhaps I´m the only DXer living on the equator. I bought the Drake SPR-4 when it was new but I don´t remember having audio problems. I now have two receivers: Ten Tec RX 350D and NRD 535. NRD 535 has not the best sound in the world buut my MFJ-616 "Speech Intelligibility Enhancer" is very useful to make the audio better. You can find plenty of information on internet for example here: http://www.eham.net/reviews/detail/2554 73s from "La Mitad del Mundo" Bjorn Malm, Quito, Ecuador http://www.malm-ecuador.com --- Bjarne Mjelde <[EMAIL PROTECTED]> escribió: > Hi Patrick, > > I did the same mod when I bought my SPR-4 back > in 1979 - and the audio > quality was just as awful. In fact the audio > quality was the main reason > I and the SPR-4 parted some 15 years later. > Maybe a highpass audio filter > might be helpful - I assume if you can clean up > the lowest 2-300 Hz the > audio quality should improve. Should have > steep edges though. > > > -- > From The World's Northernmost DX-er > Bjarne Mjelde > Berlevag, Arctic Norway > www.kongsfjord.no > weblog: mjelde.blogspot.com > > På Mon, 28 Nov 2005 10:28:11 -0800, skrev > Patrick Martin > <[EMAIL PROTECTED]>: > > > Greetings everyone, > > > > Recently I got the mod done on my Drake SPR4 > so the 2.3 crystal filter > > will work on AM. The filter is very good. In > some cases comparing the > > R/C filter, also 2.3 khz on the R8, the SPR4 > does better. It is amazing > > hearing the difference. But the problem I > now have is the audio on the > > SPR4 is so muddy that understanding is hard > to do in many cases. In > > comparing the 2.3 khz crystal filter in the > old SP-600 I had, the audio > > could be adjusted with the crystal phasing, > which the SPR4 does not > > have. The notch filter helps a bit. I do have > an old Radio Shack graffic > > eq that I could run the audio through. Any > suggestions on cleaning up > > the SPR4 audio? Thanks. > > > > 73, > > > > Patrick > > > > Patrick Martin > > Seaside OR > > KAVT Reception Manager > > > > ---[Start Commercial]--------------------- > > > > World Radio TV Handbook 2006 is coming out. > > Order yours from > > > http://www.amazon.com/exec/obidos/ASIN/0823059367/hardcoredxcom/ > > > > ---[End Commercial]----------------------- > > ________________________________________ > > Hard-Core-DX mailing list > > Hard-Core-DX@hard-core-dx.com > > > http://arizona.hard-core-dx.com/mailman/listinfo/hard-core-dx > > http://www.hard-core-dx.com/ > > > _______________________________________________ > > > > THE INFORMATION IN THIS ARTICLE IS FREE. It > may be copied, distributed > > and/or modified under the conditions set down > in the Design Science > > License > > published by Michael Stutz at > http://dsl.org/copyleft/dsl.txt > > > ---[Start Commercial]--------------------- > > World Radio TV Handbook 2006 is coming out. > Order yours from > http://www.amazon.com/exec/obidos/ASIN/0823059367/hardcoredxcom/ > > ---[End Commercial]----------------------- > ________________________________________ > Hard-Core-DX mailing list > Hard-Core-DX@hard-core-dx.com > http://arizona.hard-core-dx.com/mailman/listinfo/hard-core-dx > http://www.hard-core-dx.com/ > _______________________________________________ > > THE INFORMATION IN THIS ARTICLE IS FREE. It may > be copied, distributed > and/or modified under the conditions set down > in the Design Science License > published by Michael Stutz at > http://dsl.org/copyleft/dsl.txt > __________________________________________________ Correo Yahoo! Espacio para todos tus mensajes, antivirus y antispam ¡gratis! Regístrate ya - http://correo.espanol.yahoo.com/ ---[Start Commercial]--------------------- World Radio TV Handbook 2006 is coming out. Order yours from http://www.amazon.com/exec/obidos/ASIN/0823059367/hardcoredxcom/ ---[End Commercial]----------------------- ________________________________________ Hard-Core-DX mailing list Hard-Core-DX@hard-core-dx.com http://arizona.hard-core-dx.com/mailman/listinfo/hard-core-dx http://www.hard-core-dx.com/ _______________________________________________ THE INFORMATION IN THIS ARTICLE IS FREE. It may be copied, distributed and/or modified under the conditions set down in the Design Science License published by Michael Stutz at http://dsl.org/copyleft/dsl.txt