Hi, You'd probably be able to get $1500 on this forum, assuming the new-in-the box tubes are included. Possibly $2,000 on eBay auction, or more if a bidding...
Can any one tell me the jumper changes required to change these clocks from 12 hour format to 24 hour format. I have one of each that are 12 hour format and...
Looking for a manual or schematic (original or copy) for the Heathkit EUW-80A Voltage Standard manufactured around 1970 or so. This was a 0 - 10 Volt...
What should the grid voltage on the finals in an SB-101 be? I can only get a couple watts (yep, just 2 watts) out of mine, all the tubes are good (checked in...
Hi You're supposed to adjust the grid bias for the finals so that they draw 40 mA in SSB mode, PTT transmit "on", no audio. I think the bias adjustment pot is...
HELLO We added 5 new heathkit manuals to our website. all are high resulution crystal clear full manuals. 2 of them are replacing 2 someone once gave us but...
$$$$.$$ !!! I sure wish I could come up with something like that. If I had the money, I'd pay the $1,500.00 easy, just to have the opportunity to build it...
I have a large amount of RG-62 cable to sell . Used on many old radios for interconnections . minimum order 25 feet @.45 per foot . I will include shipping in...
I got my Heathkit SB-301/401 combination working with one strange problem. On CW, I hit the key and aside from the local audio oscillator, I am picking up...
Hi Are you using the BFO injection from the receiver to the transmitter, and heterodyne osc from rcvr to transmitter? If not, and are using the internal TX...
Hi group -- A couple of months ago we mobved our residence to a new town, new house, etc., and in the chaos and confusion, the probe that is used with the...
Hi What is the value of the series resistor when set to DC, for the probe you need? I know most VTVM's used 1 Meg Ohm in the d.c. probe. I have a spare...
Hello, I have SB-301 and 401 set. I received them from one of my friend. It was not used for sevral years before I got. After I got it, I found both have poor...
I notice calibration instructions are very different for the 1390A/AE and 1390B/BE. Can anyone tell me why. They appear very similiar on paper M.Mead...
Hi, The S2090 is cross-referenced to the NTE 5910, a Si power rectifier rated at 16 amps average current, 1200 PIV, with cathode connected to case, in a type...
Good Morning, I am new to the group and want to thank you for leting me join. I have tried to reply to a message but it does not show uo on the message list....
Good Morning, OK if I can not do a reply correct I will post a new message. Check out a " TIP31B " transistor from either Mouser.com or Alliedelec.com. This...
Dongil: This sounds like a very tricky problem. I have just a couple of questions to see if I can give you some direction. When the 301 and 401 are hooked...
I don't know much about the SB-100, but if it uses one of those supplies, it should use them all. The A, B and C designations refer to minor differences within...
Hi, HP-23 has hard-wired selection of 250/300 V output, 6V (and 12 V) filament output, adjustable bias output (in addition to fixed bias), 3A fused line plug...
I am waiting for my 'new' IG-112 to arrive. Meanwhile, does anyone happen to have a manual for this beast, that I can borrow, steal or [gasp] buy? How about a...
Does anyone have or know where I can get a manual for a Heathkit MI-104 Themo-Spotter? It is a temperature probe that can be lowered into the water. Thanks. ...
Hello, I recently purchased a IO-4510 scope from ebay. I got it cheap so I figured it needed repair. The 3000 volt section is faulty. Where can I get the...
It's hard to imagine any audio passing through it. What sort of amplifier and why do you want to do this? Regards, Neil Morrison ... From: "nickinthecity2000"...
Hi, The only advantage of a transistor rated for video is a higher gain-bandwidth product. In other words, the video transistor can still produce gain at a...
