A week or so ago I finally got up a multi band antenna - so it was worthwhile getting out an old boat anchor I scored a while back, a Yaesu FT 101. The last weekend I have spent trying to get it in order.
The lower sideband oscillator isn't oscillating.
I have desoldered and checked the transistor, the resistors and capacitors - found one slightly lifted pad - frustratingly it works for a while then goes silent. I have 'cheated' and bought another "Modulator board" PB 1184 - the one closest to the main dial. I will prob have a go at fixing the board again when I don't feel like hitting it with something hard and heavy.
A week or so ago I finally got up a multi band antenna - so it was worthwhile getting out an old boat anchor I scored a while back, a Yaesu FT 101. The last weekend I have spent trying to get it in order.
The lower sideband oscillator isn't oscillating.
I have desoldered and checked the transistor, the resistors and capacitors - found one slightly lifted pad - frustratingly it works for a while then goes silent. I have 'cheated' and bought another "Modulator board" PB 1184 - the one closest to the main dial. I will prob have a go at fixing the board again when I don't feel like hitting it with something hard and heavy.Heat related ?
Some freeze spray and a hot air gun might help you zero in on it.
Lock the hammer away to resist the temptation to use it.
A week or so ago I finally got up a multi band antenna - so it was worthwhile getting out an old boat anchor I scored a while back, a Yaesu FT 101. The last weekend I have spent trying to get it in order.
The lower sideband oscillator isn't oscillating.
I have desoldered and checked the transistor, the resistors and capacitors - found one slightly lifted pad - frustratingly it works for a while then goes silent. I have 'cheated' and bought another "Modulator board" PB 1184 - the one closest to the main dial. I will prob have a go at fixing the board again when I don't feel like hitting it with something hard and heavy.Heat related ?
Some freeze spray and a hot air gun might help you zero in on it.
Lock the hammer away to resist the temptation to use it.No need to buy expensive freeze spray, just use a can of compressed air held upside down, has the same effect but much cheaper.
A few old IBM boards... I just liked the way they looked. Any ideas as to what they actually do?
I would agree re the 'top tips' but the hardest part is indexing it.
I tried the heat technique but the components (through hole) are literally touching each other, it didn't start it back up.
I think i will replace the lot in 2 stages, 1st resistors, transistor and caps, then the crystal! Bah humbug!
I would agree re the 'top tips' but the hardest part is indexing it.
I tried the heat technique but the components (through hole) are literally touching each other, it didn't start it back up.
I think i will replace the lot in 2 stages, 1st resistors, transistor and caps, then the crystal! Bah humbug!Did you try the freezing technique as well?
adjustable USB video microscope aluminium alloy stand is excellent value for money. not made of plastic!
bonus comes with a free battery powered DVR microscope with mini video screen, is included & AC battery charger.
adjustable USB video microscope aluminium alloy stand is excellent value for money. not made of plastic!
bonus comes with a free battery powered DVR microscope with mini video screen, is included & AC battery charger.Yep, I got one of those as well, only slight problem with it is that the stand could a couple of inches higher as at full height, the field of view is still very narrow compared to other microscopes on the market. Otherwise, it is extremely good value for money.
Old HP8654A signal generator. A bit worse for wear and storage. Inside has some corrosion due to storage conditions and 3 of the front panel knobs were cracked. So I opened her up and cleaned with alcohol. Used some DeOxit on the switch contacts and 3D printed some slip-over knobs. She is working very well with the full range of 10MHz to 520MHz and a bit more on each end to boot. Not bad for $50 plus another $27 for domestic shipping here in Philippines.
Old HP8654A signal generator. A bit worse for wear and storage. Inside has some corrosion due to storage conditions and 3 of the front panel knobs were cracked. So I opened her up and cleaned with alcohol. Used some DeOxit on the switch contacts and 3D printed some slip-over knobs. She is working very well with the full range of 10MHz to 520MHz and a bit more on each end to boot. Not bad for $50 plus another $27 for domestic shipping here in Philippines.Nice.
I started a thread for the 'B' model I got not long ago:
https://www.eevblog.com/forum/testgear/hp-8654b-10-520-mhz-sig-gen-light-teardown/
Old HP8654A signal generator. A bit worse for wear and storage. Inside has some corrosion due to storage conditions and 3 of the front panel knobs were cracked. So I opened her up and cleaned with alcohol. Used some DeOxit on the switch contacts and 3D printed some slip-over knobs. She is working very well with the full range of 10MHz to 520MHz and a bit more on each end to boot. Not bad for $50 plus another $27 for domestic shipping here in Philippines.Nice.
I started a thread for the 'B' model I got not long ago:
https://www.eevblog.com/forum/testgear/hp-8654b-10-520-mhz-sig-gen-light-teardown/
Nice pictures of your B unit. Mine lacks the hinged top mounted PCB. I don't know what the other differences are. Your's looks like it was taken care of much better than mine. I suspect mine spent some time in an unairconditioned humid space here in philippines before I bought it. Thankfully the oscillator appears to be a sealed unit just like yours.
Clueless as to where the problem might be..
If it is running Windows 10 check if the drivers have been updated. If so, it should let you roll back to the previous version. Until next time they update. ..
It's Win7-64 but there is no output at all - no BIOS boot up display so nothing to do with the OS..
Replacement video card finally arrived today (GTX 1060) and is installed - works great. Nothing visibly wrong with the original on cursory examination but there's definitely no output from it, so looks like it goes in the bin
Not something I bought, but I found a green gopher snake on my ground floor.
Not something I bought, but I found a green gopher snake on my ground floor.
What a cute little guy, once again roaming in the backyard I hope?
The cute little guy went with animal control.