Thanks Gary and others for your input. Yes the plate meter fluctuates too . Max plate current 260 mills.At first I thought it was the antenna moving in the wind but when I checked it on the dummy load it did the same thing. I guess I will just wait until it stops working all together. I can't afford to have the Drake guru in this area repair it again for another $400.00 I guess he is good but he sure is expensive. I spent $500. for the twins and they worked fine for a year or two.Then the intermittent problem started. So I took them to the Guru in the Cleveland area for repair. He rebuilt the power supply and some tubes and a general tune up $400. And now here we go again. If I spend another $400. I could have bought a brand new rig. I will see if I can locate another ham that can help at a lower price. I like the Drake twins and don't want to get rid of them. I don't abuse the rigs and always pre tune with the spot feature so the rig is tuned before I add the plate current and then just peak tune for max output using the watt meter on the drake MN-2000. I double check for peak output but only advance the plate current so I have a 10 watt reading on the watt meter and adjust RF tune and preselctor for peak output still with 10 watts . If all is at max on the 10 watt setting I advance the plate current to max to check max watt meter output . It is usually 100 watts on 75 meters. Swr is 1.3 to 1.5 above 3.900. Below 3.900 I use the tuner to get a good swr usually 1.3 :1 The antenna is cut for the higher end of the 75 meter band where I do most of my activity. Anyway that's the story best I can tell it . So thanks again for the replies. It does seem more of a problem when the rig is on all day. Could be heat related. 73 de Fred WD8ADG Thanks again for all the input. 73 de Fred WD8ADG
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