hot

[Edit: It's the H802 transistor, but I can't edit the title of the thread] Hi, I am in the process of cleaning up and recapping a Marantz 2230 that has been in the family for over 50 years. I had a relamp kit I bought in 2020 still laying around, and decided to go all-in and do a full restore...

My Sherwood S-5000 tube amp runs extremely hot, can't touch protective plate without burning fingers. I tried a voltage regulator set at 110v, no luck, still burn fingers. All original tubes except rectifier which is Sovtek 5AR4. Any ideas why it is running so hot? What can I do to make it run...

I have a Rotel RTC-970 Tuner Preamplifier that has several issues that all seem to be related. The obvious operational issue manifests itself as the volume control turning itself down after the unit is on for about 20 minutes. At that point, to turn the unit off, you have to unplug the unit as...

Hello everyone. I definitely have a problem with this amplifier, when I bought it it was very neglected, it was reassembled with parts from other appliances, it had 4 diodes tied together as a power supply, etc. So I started to repair and replace everything (or almost everything) that was not...

Hi guys, I have read here many posts about these "little beasts" running hot at the right side, just over the stabilizer board. I just changed some of very well known noise signal transistors in my beloved SX 5590, regulated the stabilizer voltages, checked the DC offset, and set the bias at...

Hi. Just purchased this after years if hunting. The unit runs hot and the right channel fades out... Leaving it to cool down it works again. Could it be the DC offset or the Bias that needs to be adjusted?

I have a pair of Dahlquist DQM-9 Compact tweeters that have pushed in cones for over 15 years. I totally neglected them, and apologize to all. One was rather mangled with a dent that actually was more of a folding over, and very irregular. It was as bad as anything I could describe. No...

My Pioneer was recently the victim of the voltage-stabilizing transistors in the power supply de-soldering themselves over time, due to stress from thermal cycling. I've fixed every cracked solder joint I could find, and now the receiver is in tip-top shape again. I really don't want this...

I have been restoring a few old broadcast turntables I collected over the years. The few tables I have got going get alarmingly hot when running for a few hours. One table I restored has a newer Nidec motor and the other has the original Bodine. I search for a definitive on what an acceptable...

Heat in the STR-7065 PS appears to be a feature rather than a bug (i.e., a design error), see e.g. thread 1 and thread 2. The first reference thread mentions a hot R802; the second thread mentions the same but also that C801-C804 were replaced in a previous with 0.033uf / 600V caps...

I'm picking up an old Accuphase G-18 equalizer to offset my hearing loss. My research shows that the G-18 has pin 3 hot. How do I resolve this hook up anomaly, as the Accuphase has pin 3 hot, and my Boulder 865 has pin 2 hot? There are no unbalanced inputs on my Boulder. Thanks, a befuddled Ken

I was looking to improve on my Yamaha RX-797 receiver, in my 2-channel system. It had to be remote controllable and be able to handle my efficient but power-loving Klipsch Epic CF-4s. Always a fan of NAD, I thought one of their integrated amps would do the trick. I nearly pulled the trigger on a...

I'm wondering what others are doing to keep their vintage stereo tube amplifiers running cool, eg. older tube units by The Fisher, HH Scott, Eico, McIntosh, Marantz, etc. most were designed to run on historically-lower mains voltages so will run hotter now because of today's higher volatges...

I became the proud owner of an SX-D5000 this week. I was suprised at the size and weight of it but after giving it a clean and checking the DC offset I hooked it up and I was blown away. It's the best thing I've ever heard! Hooked it up to my PD-91 and starting playing some tracks through the...

I got one of these a few months ago but only just got into using it this week but I've noticed that the transformer does hum noticeably and gets quite hot. Even when idling. Is this anything to worry about? The hum is from the transformer itself rather than the amp.