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I have a Heathkit HW-16 that I would like to get on AM phone with. I have been doing some research. So basically do I just put a modulation transformer in line with the plate voltage input of the tube? (what is pin 6 on the 6CL6) Also should I modulate the driver or the final tube? The tube...

I have a Heathkit HW-16 transceiver, when I bought it, it. Was advertized as having an AM transmit modification. So. I can see some add on boards inside on the receive sie that aren't in the schematic or any of the diagrams, so I can't find this modification on the internet. I need to find out...

Well I mostly was interested in 20m and 40m, I am a bit limited as to an antenna, I am preparing a dipole for 40m now. T23

I just bought an icom ic-701 with the matching power supply and a mic off ebay, everything works and its in great condition, any comments on this radio? It covers 10m through 160m. T23

There was that one, and also a mod for 15khz instead of 30khz channel spacing. I read some of this on eham. T23

There are a few mods, like a 10khz switch. T23

Does anyone have anything on this radio? I need to replace some 12 volt lamps so I can see what frequency its on again, and might aswell make any improvments I can to it while its open. Yes I know its an older set. T23

Does anyone have anything at all on this radio? I need to replace some of the blown 12 volt lamps ( so I can see what frequency I am on) and might as well do any improvments I can while its open. And yes I know its an older radio... T23

I have been doing some tests, its been going well, the circut works great. The only thing is that its kinda quiet on the receiver. So I was thinking, should I add the 10uf capacitor across pins 1 and 8 to boost the the gain to 200? 9r should I wait and see how it sounds when the rest is done? I...

Here is the schematic I am basing my final section on, still debating on the buffer stage. I still have to order the toroids ( two FT37-43 ) and the voltage regulator for the Mosfet bias, I think the bias is suppose to be about 2.5 volts, I have found a voltage regulator at radioshack that is...

I fixed it, it works now, I put a .1uf ceramic disk capacitor inline with the output to isolate the dc voltage from the RF, no noise in the signal from the tests, but I haven't modulated it yet. I am using a different transistor than in my schematic, its a 2n4401. T23

Yeah, I am also trying to fit all this in an altoids tin, too. .I built the fist stage, I tested it, but it did nothing. I think I found the problem though, two cold solder joints... I need to figure out how to do somthing other than toroids for the coils in the final. But first I need to get...

I was thinking about the buffer stage but the schematic I am using for a base for the final stage on my transmitter does include a buffer but its output is less than my first stage here. The output of the buffer is about 260mw , what I have have now already should do about half a watt. T23

I think I got it sorted out now, just trying to figure out if I should do the keying in the first stage or the final stage and how I should go about that. T23

Thanks for the suggestions CK, I'll make the ajustments to the schematic and see how it goes, just a side note...How does the cap on the output affect bass response, will increasing the value increase or decrease bass response , volume and modulation? I need this to sound clean but still loud...

There is voltage present at the colector, through the opamp, pin 6 is the power input, the voltage is also present on pin 5 the audio output ,same as the voltage input on pin 6. But if that is not the case, what value capacitor do you suggest to put between the output of the opamp and the...

I drew this schematic, its a QRP AM transmitter for 40 meters. Have not built it yet, does it look like it will work? This will feed an IRF510 Final amplifier section that I am building aswell. Output should be about half a watt from this section, driving the IRF510 Final section and should...

I have a Heathkit HM 2102 for VHF, how acurate would it be on HF? I have tried it it seems to be spot on, reads wattage perfectly and getting simular readings as my radioshack meter does for SWR. T23

I have a Galaxy dx 44v here that I bought at a pawn shop, I was reading the specs and it stats that this radio should deadkey 8 watts max on high, it deadkeys 15-20 watts and swings even further, any ideas of what may have been done to this radio? I know this radio is suposed to have one 1969...

What are these frequencies allocated to or used for? T23