Finally bought a decent amp. - QRZ Forums
Jun 19, 2020 · Dont run a AL-811H past 600W maximum on SSB without processing and 500W with if you want reasonable life from perfect tubes. Here is the latest Chinese 811 with correct markings as a FU-811 and a 1250V rating, what it does in an Ameritron amp is anyones guess. It appears to be from a new source as the Shuguang logo is missing.
al-811 - QRZ Forums
Yeah, after much saving and out smarting the wife I picked up the Ameritron AL-811H (800 watt) amp. It is much easier to use a tube amp than I had... Thread by: WJ6F , Jun 19, 2020 , 26 replies, in forum: Amateur Radio News
Low output AL 811H | QRZ Forums
Dec 25, 2018 · Greetings, I have an issue with my Ameritron 811H. Output used to be 600-700 watts with 65 watts drive into the four Chinese 572B tubes I have in the...
AL-811 OR AL-811H | QRZ Forums
Aug 14, 2012 · I am going to purchase either the al-811 or the al-811h this weekend in Huntsville. I decide on the 811h, get ready mentally to lay down the cash, and then I get greedy (or cheap one), and change my mind to the al-811.
How I Tune Up My Amplifier | Page 3 | QRZ Forums
Jul 7, 2021 · I had an Ameritron AL-811H, first generation (say mid-1980s) 800 watts. I got it on a trade from a local yahoo swapper scrounger. First thing I did was buy a set of matched 811s for it; I put them in and let them cook for about 10 hours on 110 VAC. Second thing I did was drop a 220 VAC 20A line in the office to feed that amp.
AL-811H parasitic choke | QRZ Forums
Dec 12, 2020 · AL-811H parasitic choke. Discussion in 'Amateur Radio Amplifiers' started by KJ7OCO, Dec 12, 2020. KJ7OCO ...
New Elecraft KPA1500 Amplifier Presentation | QRZ Forums
May 22, 2018 · The AL-811H is an awesome amp for the money, but, That is not 1500 watts. it does not do 6 meters. I have the KPA500 now, really really nice and well worth the price. The KPA1500, I can not afford yet. Bought a new car this year. LOL.
MFJ-998 automatic antenna tuner 1500 Watts - Review and Setup
Jun 18, 2017 · This is the MFJ-998 automatic antenna tuner 1500 Watts - Full Review and Setup. Tested with my Kenwood TS-990 and Heathkit SB-221 1.3kW tube amplifier...
Ameritron Blasts QST for Article Accuracy and Safety
Dec 19, 2011 · I have to take the case off of the amp (AL-811H) to change the tubes and that activates the safety interlock. I think you need to read a little more or take your own advise. WD8FM , Dec 21, 2011
How I Tune Up My Amplifier - QRZ Forums
Jul 7, 2021 · A few points: Since 811As cannot withstand anything more than about 260W continuous output (for four of them in the 811H), keep key-down times very short if running anything more than that; however, the most important things to watch are actually output power and grid current.