Heathkit Repair - RF Signal Generator IG-102 PART 2 of 5
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- เผยแพร่เมื่อ 19 ต.ค. 2024
- After baseline measurements, the initial problem diagnosis of the Heathkit IG102 RF signal generator is conducted along with baseline troubleshooting for this repair and restoration project.
I just picked one of these up & have been going through it. I was glad to find your vids on this unit. An interesting note.......I was getting 90v on pin-1 of my 6AN8 & my schematic shows it should only be 75v after a 10k resistor. Problem is there's a 4.7k instead. Watching your video #2, I noticed your plate voltage checked out OK even though your schematic lists a 4.7k rather than a 10k like mine. But........your unit DOES have a 10k resistor there, hence the proper plate voltage. Revisions are fun....
Most of the components test "OK" but a few need to go (e-caps obviously). Other issue I'm seeing is my AF is only around 300Hz...... not a big deal but I'd like to see it around 400 if I can get it there. Thanks for posting the series.
Glad you enjoyed it. It’s an o d series and sadly these predate a gimbal and are of lower quality.
this week i hope I'l get a RF1 :) "NOS" never soldered. It will by first kit/equipment from them. It looks verry similar to this at least in the pdf manual... and yes. I will make it and enjoy it !
New old stock original or a re-pop
@@retrotechandelectronics well... i bought it online as a never soldered NOS , the box in carton the parts are in paper bag it has a original printed manual tubes in boxes... I don't know what a repop is, a dismanted one? it has the tube sockets terminal strip and de variable capacitor mounted... I don't know how they came... I doubt the seller knew much about electronics. and i doubt had the patience to disassemble it just to sell it for 50€ (~60usd or so) . Anyway, i'm excited and i don't care.
And I really enjoy you videos. i binged this series :)
@@vladnickul that’s a steal. It’s rare to find that.
@@retrotechandelectronics I got it! received .. two of them one fully assembled ( with a permanent marker price, in old currency that puts him on sale in 2000-2005?), and the kit...in a separate box (it doe not look to be 60 years old... )
The kit is a mix of parts, some resistors are precut, the resistor with mica cap soldered and so on. Anyway I'm fine with what i got. One for fiddling and one of posterity :) I will take a closer look today
Your filament voltage is higher than it should be because the AC line voltage is higher now than it was back in the '60's. While it used to be 110-115 VAC back in the day it's now around 125 VAC in a lot of places. The "230 volts" coming into my house actually measures 244!
steve c they’re not charging you extra, are they? LOL
@@Shnick What has your silly reply have to do with the subject? Voltages being higher than they used to be when a unit was made does cause problems.
I have one of these that also looks brand new. I haphazardly installed a new line cord with a ground which I connected to chassis ground. I then installed two BNC connectors on the front panel and replaced the filter capacitors in the power supply. Now I get a signal in the correct range of a receiver but now I have no internal modulation. Any direction you can give me would be much appreciated.
All I could encourage you to do Is walk through the schematic starting from the power supply outward.