I've had good luck with J J (tesla) tubes for output tubes, EL34 and EL84. I've had good luck with Sovtek preamp 12AX7s but not 6L6s. I use NOS that I have collected from various sources, especially hamfests. The Electro Harmonix 6L6s seem to be fine, I think that they are picked out Sovteks and the Groove Tubes 6L6s though expensive work well. I think that they are tested Sino or that they are making their own tubes now. There are new Gold Lion and Mullards now as someone is using their designs or even the original tooling. Some are reasonable in cost, some are only for audiofools with more money than sense.The Mullards are supposed to be good and not overpriced. i haven't tried them as I have some NOS units at home. Output tubes last for a few years with regular use, preamp tubes last me for many (10+) years with regular use. Ken Zuercher KC8QO
--- jeremy-ca <[EMAIL PROTECTED]> wrote: > My son uses a Koch guitar amp with Ruby EL-34B-STR > tubes and they dont hold > up well, another one shorted last week. > > What are the preferred brands? Searching the web > gives a lot of conflicting > info. > > Carl > KM1H > > > ----- Original Message ----- > From: "Ken Zuercher" <[EMAIL PROTECTED]> > To: "Discussion of AM Radio in the Amateur Service" > <amradio@mailman.qth.net> > Sent: Friday, December 07, 2007 12:39 AM > Subject: Re: [AMRadio] 6CA7/EL34 replacements > > > >I agree about the guitar shop. The Marshall amps > use > > EL34 tubes and are pretty tough on them (like me, > I'm > > a guitar player) I like the JJ tubes as they were > the > > Tesla brand and are made in the Czech Republic. > They > > also have a model with beautiful blue glass > envelope. > > Ken KC8QO > > --- Mike Sawyer <[EMAIL PROTECTED]> wrote: > > > >> John, > >> If you are in a hurry, try checking out your > >> local guitar shop. I'll lay > >> odds that they have them available for about the > >> same price you get for mail > >> order. > >> Mod-U-Lator, > >> Mike(y) > >> W3SLK > >> ----- Original Message ----- > >> From: "John King" <[EMAIL PROTECTED]> > >> To: <amradio@mailman.qth.net> > >> Sent: Thursday, December 06, 2007 4:08 PM > >> Subject: [AMRadio] 6CA7/EL34 replacements > >> > >> > >> Please disregard my earlier post requesting > >> information about substituting other numbered > tubes > >> for the 6CA7 for testing purposes. > >> > >> I got the transmitter working with the "old" > >> 6CA7/EL34 > >> tubes. Now to order some!! Has anyone had much > luck > >> with the cheaper import 6CA7 tubes such those > sold > >> by > >> Antique Radio Supply under the brand names of JJ > >> Electronics and Valve Art ??? > >> > >> Thanks for reading. 73, John, K5PGW > >> > >> > >> > >> > > > ____________________________________________________________________________________ > >> > >> > > > ______________________________________________________________ > >> Our Main Website: http://www.amfone.net > >> AMRadio mailing list > >> List Rules (must read!): > >> http://w5ami.net/amradiofaq.html > >> List Home: > >> http://mailman.qth.net/mailman/listinfo/amradio > >> Help: http://mailman.qth.net/mmfaq.html > >> Post: mailto:AMRadio@mailman.qth.net > >> To unsubscribe, send an email to > >> [EMAIL PROTECTED] with > >> the word unsubscribe in the message body. > >> > > > > > ______________________________________________________________ > > Our Main Website: http://www.amfone.net > > AMRadio mailing list > > List Rules (must read!): > http://w5ami.net/amradiofaq.html > > List Home: > http://mailman.qth.net/mailman/listinfo/amradio > > Help: http://mailman.qth.net/mmfaq.html > > Post: mailto:AMRadio@mailman.qth.net > > To unsubscribe, send an email to > [EMAIL PROTECTED] with > > the word unsubscribe in the message body. > > > > ______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > List Rules (must read!): > http://w5ami.net/amradiofaq.html > List Home: > http://mailman.qth.net/mailman/listinfo/amradio > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:AMRadio@mailman.qth.net > To unsubscribe, send an email to > [EMAIL PROTECTED] with > the word unsubscribe in the message body. > ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
