开云体育

I use 300 mA as a max at 4kV B+ in CW. The issue with grid dissipation is that the tube’s input impedance needs to be known and it’s not a trivial value to determine. I trust Ameritron’s

The amplifiers were sold without tubes because they cost too much and killed amplifier sales. The 3CX1200A7 can also be used in place of a 3CX1200Z7. Look here to see the spec sheet of both tubes:

I have an AL-1200 with the 3CX1200Z7. The tube has a grid dissipation rating of 50W, but I've found no spec for maximum grid current. On page 5 of the AL-1200 manual it says do not exceed 300ma during

It was $3500 shipped.

So far, so good.? What was the price, including the power supply ? Tom left Ameritron in 2019.? Dunno who actually designed it.

I have only had my 1406 for a month now. It is performing well. Some one told me that they had a 1406 and that it would do 1500 watts easily. I just tried mine for the first time at that power level.

I too, have had an ongoing issue with the band switch in my FL-2100B. After repeated band switch repairs (replacing contacts you did) I ultimately found my problems were being caused by a keying delay

Jordan. I commend you on your repairs. In my view and experience, 160m in the FL-2100Z was an afterthought and I have never seen one operate really well in the VK segment of the band. They are

Thanks everyone for the response. I ended up drilling out the rivets and replacing the fingers with a similar wafer switch with basically identical fingers kindly provided by a local ham, I used small

Thanks Joe. Price becomes a big issue when you try and get it to Australia. There are 2100B and TL922 switches on Ebay but none for the 2100Z. I have a brand new 2100Z switch? here and I'm in

It has been a couple of years since I checked, but, Yaesu had a bunch of band switches for the 2100 amplifiers..pricey..Then 125 bucks. Dunno if they covered 160 or WARC though. Have you called them?

Sir thanks for the reply Alek turns out it's the band switch. I'm going to have to rebuild it I can't find a new one sadly 73 Jordan

Yes, it's a possibility that those capacitors are bad but more likely is that the 80m and/or 160m contacts on the band switch have been burnt away. It is quite common on the 2100Z. Shine a light down

Protection Board Installed And Wired. 3CX6000A7 12KW CCS 160-15 Meter Linear Amplifier Here the modified protection board is installed, along with the vac relays, cutoff bias resistors etc. The series

FWIW, I usually slide the cabinet back and adjust the coil under load. I test to see if lowest swr and maximum output coincide. ?If not I’ll opt for maximum power. Sent from the all new AOL app for

I would like to tweak the input tuning on my AL-1200 to see if I can reduce the VSWR presented to my FTDX101MP. The AL-1200 manual doesn't say anything about this, and doesn't even tell which coil is

No pix. BTW, on those Eimac SK-500 aluminum sockets, on the 1st posting, we would slice the bottom off in the bandsaw. The aluminum sockets have a big restriction vs the Eimac SK-510 black plastic

Amazing the 7300 has this rail end RF issue. ?Seems like Icom has be plagued with with these RF issues either on make or break. ?I recall a friend had an Icom 781 and. alpha 86a or 9500 and he was a

##? Lou, even if u tweaked the output contacts of the old style clunker 3PDT mech relays such that the output closed before the input+ bias,? it will still hotswitch !? The xcvr puts out RF?

"This article is concerned with the RF output continuing beyond the time the transmitter is keyed off, termed an RF-tail, causing hot-switching of external linear amplifier.) Unfortunately, there is