Yep - and I've found 6AH6's for $3 locally. I fully understand that there are a lot of folks who want to keep their sets original. It's especially important with mint-condition sets. The two tube types are not 100% identical: that's why the two types exist. The Drake engineers intentionally picked this tube for a reason, and there may likely be changes in performance when you sub. But many times those changes may need precise equipment to measure them.
I've pulled in some "hamfest-fresh" R-4B's that were using 6AU6's in place of V2 and V8. Yes, the receivers were working - it's the same pinout, but a 6AU6 has very different characteristics out at the edges of performance. I've replaced 6HS6's with 6HS6's until recently, but they're getting increasingly difficult to find and expensive. I've done some work for others, too, so I make them aware of the sub and ask which they want now. It would be interesting to do some full-blown testing on an R-4B with each tube type so that we could have hard data. Tests identical to what the ARRL Lab uses would be quite informative, I'm sure. I don't have the equipment necessary for testing 3-order response, intercept points, etc. Anyone got access to a decent lab? 73, Steve Wedge, W1ES/4 "Just so the wealth of the country, its capital, its credit, must be saved from the predatory poor as well as the predatory rich, but above all from the predatory politician." - James Jerome Hill All my computers have my signature with various pearls of wisdom appended thereto. From: [email protected] Sent: Monday, April 30, 2012 1:21 PM To: [email protected] Subject: [Drakelist] 6AH6 tube availability hi gang After reading the farakus about getting 6AH6 tubes, I checked one of my favorite sites, and viola 4 Bucks The web site is radioera.com/tubes.asp. Enjoy them Drakes Tom, WD8JPP -------------------------------------------------------------------------------- _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
_______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
