... not ... and W-7? ... what the ... Williamsons? ... amplifier is it's OUTPUT Transformer.The rest of the original circuit is reasonably conventionalThere...
We used to roll blobs of the stuff around the bench in science at school and never came to any harm. We had the stuff in pint bottles. There's provavly no more...
Well, Like someone else said, mercury is not as poisoning and can be esily contained in its elemental form. It's mostly higher vapor concentration and...
Or there were at one time, solid state plug-in modules that fit each tube socket that substituted a sloid-state rectifier module to avoid the tubes altogether....
The SB-101, like all of the Heathkit SB and HW series transceivers, use the same heterodyne oscillator crystals for both transmit and receive. If the receiver...
Sideband IP meter readings will be 1/4, or less, of the reading obtained on CW. In sideband mode, the key is to adjust the mic gain control so audio peaks...
Heathkit HW-16 Mods. From 15 Meters to 20 Meters. Information taken from the Nov. 1975 QST Magazine pages 35 and 36. Written by LLEWELLYN P. ROSE/G5BGA A....
... The differences are mostly, age of design (lower ones older), and power ratings. The basic ciruitry is similar. I don't have the specs handy, but there's...
... wrote: .. ... makers ... high ... their ... It was a veritable marketing genius (and con artist) who came up with the term "Transient Peak to Peak Power"...
Interesting that this should come up. I just finished restoring a Warrior, and it had the 3B28 tubes in it that someone on this list referred to. They seemed...
... I do remember going into a Sears and looking at a Silvertone stereo radio/record player one-piece console. It had a big sunburst emblem on a ribbon draped...
... wrote: ... flatly: "This is ... I remember reading that Consumer Reports article. I was into Heath ham radio gear at the time and this just confirmed what...
... I was one of the two-man design team, so can't claim all the credit. A lot of the features and design elements also came from other Heath projects, too. ...
The 866 is a Mercury Vapor rectifier tube. What makes it unique to other rectifier tubes such as the 5R4GY, for example, is the 866 contains a small drop of...
Hi Fella's I was wondering if it is acceptable to use 6146B's or isn't it? After I finished off this restoration it had 6146B's installed and they seemed to...
George, Thanks...I really enjoyed that....and all along reading your posts I knew there was something different about you and your methods of explanation,...
Hi Dennis, Thank you for your advise. I took voltage readings at the 100k ohm resistor at v19 to ground and this is what the voltage readings are: 3.5Mhz,...
... A good example are some current powered subwoofers that carry power ratings in the thousands of watts range. One wonders where they take all that power ...
... known problems. The origional 6146B's installed are still in the rig and still puts out full power. I did read the Heathkit service bulletin before I...
Just some thoughts I have on your problem. Each individual band heterodyne oscillators should be adjusted for a voltage reading between -.5 to -2 volts. When...
Just some additional info on the 6146's. Although the manufacturer no longer produces new plain Jane 6146's or the 6146As, there are various parts outlets that...
Hi, The 3B28 tube (drop-in replacement for 866A) uses low pressure Xenon gas, which ionizes when HV is applied. The main advantage is that there is less risk ...
... always ... First kit was an EICO VTVM (still works) at 14, ham radio licence and starter RX Knight Kit R100A at 15, and SB-101 at 16 to replace the R100A...
Garry, I have asked this guy for some info on this and previously some other matters, but despite chasing it he has not responded. To be honest I don't think...
The fact that 3 bands all have low oscillator grid voltage indicates that the problem is unlikely to be crystals, unless all 3 crystals have failed at the same...
... send a note to the yahoo Heathkit group and let us all know how it well the modification went and how well it worked on 20 meters. It does surprise me...
Will do, Dennis. The HW-16 I have is one I built back in 1972. Also build the HG-10B VFO. I still have it too. I am for sure going to modify my hw-16 if I can...
