Man! You did whip that radio! I typically would get about 100 watts out if I ran maximum smoke out of it. Noting that Kenwood recommended a plate current of 200 mA, I would back the gain down to that figure, instead of the 250 mA that I could get if I wanted to let it all hang out. 200 mA would still deliver about 90 watts out. That tells me that noting the discrepancy in power increase and current increase, I probably was either throwing a lot away in heat or starting to cause some non-linear operation, or both. Anyway, I decided that it wasn't good for the tubes, and ran the radio according to Kenwood's instructions and it always gave me faithful service. 73, de Lou K2LKK At 05:30 PM 2/18/2008 +1100, you wrote: >the 520 I use to ownI must admit copped a beating. I drove it flat stick >all day every day. I squeezed as much as I could out of the thing which >in the end was roughly 150 watts. to my knowledge, it's still on the air >to this day. > > >On 18/02/2008 8:55 AM, the old scribe known as John Miller was able to >impart this pearl of wisdom: > > I can't believe all the TS-520, 530, 820 and 830's around on ebay, as well > > as other sites and still on the air. I know a lot of people still using > them > > as their every day radios and have for a very long time. If you treat them > > right, you can't kill them. I know people literally who use them every > > single day. > > ----- Original Message ----- > > From: "Richard Fiorello" <[log in to unmask]> > > To: <[log in to unmask]> > > Sent: Sunday, February 17, 2008 4:11 PM > > Subject: valve radios > > > > > >> Hi; > >> Haven't heard any specific references to "valve radios" but if you are > >> considering a radio with tube finals there are lots floating around at > >> reasonable prices. There are circuits that will give you a variable tone > >> as > >> the rf output increases. > >> Lots of tube radios have lots of life left in them and they are becoming > >> more reasonable unless you want collins. > >> Now if money were no object a old collins station would be fun. > >> Richard > >> > > > > > > __________ NOD32 2881 (20080217) Information __________ > > > > This message was checked by NOD32 antivirus system. > > http://www.eset.com > > > > > > > > > > >-- >No virus found in this incoming message. >Checked by AVG Free Edition. >Version: 7.5.516 / Virus Database: 269.20.7/1285 - Release Date: 2/18/2008 >5:50 AM Louis Kim Kline A.R.S. K2LKK Home e-mail: [log in to unmask] Work e-mail: [log in to unmask] Work Telephone: (585) 697-5740