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I purchased a 70 Watt Amplifier Kit and built it [ATTACH] Unfortunately, the kits do not come with any instructions. I have managed to find a...
I'm nearing completion on a pair of 813's for 20 meters, grounded grid. Plate Pi-net is tuning properly as verify with my trusty Millen GDO....
I just received a Biggs Electronics Contex 150 linear amplifier. I need as much as information for this amplifer. Does anyone have a copy of...
I'm designing a grounded grid amp for 20M using two 813's. Tube spec shows output capacitance of 14pf per tube. So in my tank calculations I...
I am looking to add an amplifier to my setup, probably an Acom 1000. I currently run a Kenwood 590S, connected to a quarterwave vertical multi...
Hi there. My friend KA1YBT, came across two Heathkit amplifiers, rated at 2kw input, 80-10m. They look identical to the SB-220, however, they are...
I'm curious to know if anyone has an idea what this part is. I cannot seem to locate it in the manual. It appears to be a wire wound resistor or...
Please forgive me if this is a completely absurd question. Why do all the HF-capable SDR transceivers seem to follow the (expensive) paradigm of,...
I have an VHF amp that runs off of 13.8vdc (like most do). How should I run the wires going to the amp? Should I hook it strait from the battery...
I have an older AL-80B that is having intermittent output problems. They seem to be related to cycling the bandswitch. I have a thread in the...
hi, I bought a set of Micom 500e Motorola and Tadiran. Everything Works Fine, I sold in Motorola 2ET HF Equipment and I kept the Tadiran 500...
Hi, I'm looking for the Daiwa LA2035 amplifier wiring diagram. Does anyone have it? The LA2035R version is not good [IMG]
I replaced the capacitor bank and nothing else a month or so ago. The meters were doing this before. And you could smell that old capacitor smell...
Hi; I have written to the vendor for documents to calibrate the AL-811H, and I am referring to the controls on the back for adjustments on bands....
Do anyone has or used the RBI-1 Relay power interface from radiodan.com and has a view of internal components? What I am trying to find out is, if...
Here in my AL-811H, it seems to me it has been modified for 10 meters use. I got it used. Now, I notice that the coils are 3 of 5 turns and 1 of 6...
I'm setting up a mobile HF station in my Toyota Tundra consisting of an iCom 7100, Ameritron ALS-500M (controlled with a ARI-500), and a Scorpion...
Got my SWR's measured and the highest is 1.5. Will the SWR increase dramatically when an amp is used? Most bands from 80-10 are 1.1. Highest are...
Hello, I recently purchased an RF Concepts RFC 2-117 amplifier. Upon receipt, I wired it to an Astron power supply (14.3 V). With nothing else...
