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Hello all, My name is Douglas Thompson I am an ISCET certified electronics technician. I live in Tacoma Washington. I have been working on electronic gear for over three decades. I was teaching electronics theory at Clover Park technical College for over 4 years, and I was a field warranty technician for Carver for around 6 years. I still have and work on alot of these amplifiers every week. I am at the moment working on a pm1.5t that the entire fan assembly is missing, so I am trying gto find one to put in it.l

Hi, I am the owner of Infinity IRS Beta as well as other Infinity speakers. I am contemplating Genesis II

Greetings. Thanks for the add. My dad owned a burglar and fire alarm company from the 70s - early 90s. In addition to installing alarms in high end homes, he installed Hi Fi on the side. We always had a bitchin sound system in the house growing up. I remember him playing discs (not compact, but the size of vinyl) way back in the day. Then we had CDs way before most even knew what they were. Well he passed away a few years ago and I've come across some of the stuff... Like others, I inherited my dad's carver stack: C-2 preamp, M-1.5t amp and m-200t amp. They haven't been used in many years. I'm wanting to hook up a Pioneer record player to listen to vinyl in the house. First, some guidance on connecting everything up would be great. Can I use both the M-1.5t & the M-200t? Or is it one or the other, not both. If that's the case, which do you suggest? Next my volume control seems corroded. I've tried spraying CRC Electronic Cleaner and turning the knob, but it's ineffective - lots of cracking and R speaker comes and goes. Should I try something else? Is there a replacement? Thanks for the help.

That is a problem for many sealed pots. Simply no way to get to the tracks to clean them. This PSE studio 1 had 3 expensive noble cast aluminum pots ,2 in the tone control circuit plus volume The balance control had a open area on the side for access but in most cases you have to unsolder many pots and take them apart and open them up to do it properly

If you have cleaned the volume pot and it still crackles or you have channel drop out you probably need to clean the balance pot. I am no expert, but I use fader lube on pots and contact cleaner on switches. Both caig deoxit.

"This couple bought a rundown abandoned house for $1.5 million and plan to make it their forever home: Take a look inside...While cleaning out the home, they found some of the original furniture, old photos of what the house looked like before, and a record player that was hooked up to speakers all over the house. Volkov found that discovery pretty exciting. 'Imagine having a house back in the day and you could play music everywhere in it from a record player,' he says. 'The record player was still there when we bought the house, so that was really cool.'" https://apple.news/AjoyndHDJQOms8_wEhzSNXQ 😎 🔊

He! Spoken by a true Pilot…

Hello all. I recently acquired some carver gear. An M500t amp and a TFM 35 amp. Looking for some direction on the M500. I understand it’s a dual voltage unit using low and high voltages on the rails. My issue is the relay doesn’t close upon power up. I’m leaning toward the op amp or something in that circuit. All the rectifiers check out good but I’m only getting around 30v on the low V side. Not the 40v it’s showing in the manual. The relay is good as I have supplied 24v to the coil to test it. I know these amps are different than most I’ve worked on but I’m ready to tackle this one. Thanks in advance for any input and I look forward to interacting with all of you. Cheers.

You need to test TP 1 to TP 2 - NOT to ground… same with 3 & 4.

Just look on any Ivy League campus.

Chris Rea, Blue Street

Love this lady's drumming... she's a youtube sensation :). This cover of a classic song is pretty darn good. Love the vocals.

Newbee here,,,,, looking forward to learn what all this site is about. Had a Carver system 25 years ago ,,,,, now putting several Carver systems together for my own enjoyment,,,,, hope I'm not to late LOL🤕

Hey all! Thanks for the warm welcome! I'm working on four (4) systems, 2 have three (3) TFM 55's sledge hammers for the bang and umph, one has a CT-29V and the other has a CT-28V for directing traffic. The third has three TFM-45 high head room bangers, it has a C-16 for directing traffic and the purpose is to well,,,, see how it performs against the other two,,,, blame Roland for that lol The later is umm,,,, well and please don't be upset, is a bit of a hodge-podge to be honest. Basically its an old Toshiba mini system that's in the process of getting two (2) TFM-35 framing hammers fitted to it to replace the tired amps that came with it

if the relays are not engaging, your amp is likely in protection. Something has gone wrong. Suggest you start with downloading the service manual. Check the output transistors for shorts. Also check for DC offset at the outputs (up stream from the relays). This may help narrow down why its going into protection.

I promised this a while back, and actually completed it in October with my audio buddy Travis. The initial question - What sounds better, SACD or DVD Audio? I happen to have three (3) different albums in both formats, AND I have all three on CD (FLAC) as well. I will start by saying that this sounds like a fun challenge, but I assure you, it was anything but. I found it difficult, annoying, and frustrating AND it had the added bonus of pretty much burning me out on these albums. In fact, I was so annoyed with the whole challenge that I neglected to even write it up here. Then a couple days ago, @MLB111 kindly inquires about the results. Shit. I suppose I should publish them, if for no other reason that to dissuade anyone else from venturing down this path. To make matters worse, I cannot locate my original notes - but I can remember a lot of it, so I enlisted my son’s help (he’s just getting in to the hobby, and starting to learn the ins and outs of high quality audio). I’m going to break it up into 3 parts - one for each album, mainly because it’s tedious and exhausting, as you’ll soon see. The system - Oppo 105 to BillD C1 to Silver 9t pair, to NHT 2.9 speakers. Kimber and MIT ICs, and MIT Terminator 4 speaker cables. The album - The Nightfly, by Donald Fagen - SACD, DVDA, FLAC. Whenever I do something like this, with media OR gear, I tend to listen to the overall presentation of course, but for the real substantive measures, I tend to focus in on the smallest, most subtle details I can find in the recording, and compare those details - wether it be between speakers, amps, or in this case, SACD and DVDA. * I cannot stress this point enough before I continue - the differences between these discs (SACD & DVDA) are so subtle and so slight that even identifying them was exceedingly painstaking. Further, these differences would most likely NEVER manifest in normal listening and comparison * For Nightfly, I found the most differences in two tracks: Track #1, I.G.Y., and track #5, New Frontier. #1, I.G.Y. = at the 52 second mark, right as the intro ends, and the trumpet fades and the vocals start, there is a very slight cymbal that is completely different that the prior cymbal cadence. It’s one strike, slightly left of center and a couple feet behind the speaker plane. The same cymbal strike happens again at 1:25, 2:10, and a few more times later in the track (sorry, I didn’t feel like listing them all). This cymbal is more prominent in the DVDA. It is a bit more “buried” in the SACD version, and not as defined. At the 2:08 mark, there is a snappy bass “flurry”. The SACD presents this with a tiny bit more “pop”, and a better “edge” the the string plucks. As I listened to this track for perhaps the 20th time in this sitting (ugh), I turned to my son half way through and said “is that a tambourine ?” I have listened to this track many times in the past, and I don’t EVER remember a tambourine. Back to the start of the track, and sure enough, no tambourine. It actually comes in at the 1:28 mark. It’s subtle, and EASILY mistaken for a cymbal. The DVDA does a better (slightly) job of defining the individual cymbal-ettes (?) around the circumference of the tambourine than does the SACD. #5, New Frontier = At 1:30 (and again at 2:40) there is a distinctly different guitar sound solid.y in the left channel. It’s tone is so different that it is almost distracting. The SACD did a better job of blending this into the overall presentation - However I’m not positive that’s a good thing, so take it for what it’s worth. In the intro, there is a cowbell in the percussion. On the DVDA, it sounds more like a cowbell - on the SACD, it lacks some of the “metallic” overtones, rendering it almost more like a wood block, than a cowbell. There is also a harmonica solidly in the right channel in the intro. On the DVDA, this harmonica is considerably more forward and distinguishable. On the SACD, it is markedly buried in the mix of other sounds in the right side of the soundstage - THIS is the most significant difference in the two discs. Overall, the edge here goes to the DVDA - the subtleties noted above, and a very slight edge in overall clarity and separation of the many instruments is the reason I feel the SACD comes up ever so slightly short. Again, I cannot stress the small measures here - it literally took hours to determine the differences. As for CD and/or FLAC, the differences there are significant - width of sound stage, detail in the specifics listed above, and overall dynamics give a clear edge the either of the high res formats over CD or FLAC.

Welcome! Since you found two amps I'm guessing your dad used the bigger amp (1.5t) for the 'main' system and the 200t for a second room? But if you're only working with one room, the M-1.5t should do the job nicely. But either should be fine if it meets your power output needs. For the volume control, in some cases it's hard to get the liquid into the pot for cleaning. If the CRC doesn't change at least reduce the crackling, I'm guessing it isn't getting into the wiper of the pot. If you are comfortable with removing the cover so you can get direct access to the pot, a straw on the CRC sprayer should be able to get the cleaner in there. Look for a little opening/notch in the pot body to allow access. Spray it with power off (and the system unplugged and sitting for 5+ minutes), rotate the pot fully back-and-forth 4-5 times, then reconnect everything and try again. And @Balok had a good insight as the Balance pot can also get distortion into either audio channel. In fact, if you've gained access to one pot, it's a good idea to clean them all. Good luck.

I checked all of the output transistors Q119-126 as well as Q118,119,109,110,116,117. All test good

Welcome! I found that Carver Silver 7t amps powered my Infinity Kappa 9's quite nicely. I've moved on from the Infinity speakers, but not the amps. Carver amps really like Polk and Infinity speakers.

Plinius SA-201 power amplifier, Infinity Kappa 9.2i speakers, Jamo Classic 10 speakers, DENON PMA-S10III integrated amplifier, Luxman M-300 Class A/AB power amplifier, a few Pioneer integrated amplifiers I started with, Wiim Pro Plus streamer and building up 😅

Sammy Hagar Can't Drive 55

Two pair

Chicago Underground Quartet, Good Days (album)

Yes Big Generator (Full Album 1987) https://youtu.be/aVFKarUsYx8?feature=shared

The Derek Trucks Band, Soul Serenade (album)

Slow smokey nightclub sound. And great baritone sax with him on this one.

Coco Montoya, Hard Truth (album)

Rod Stewart Maggie May

Welcome @BigB, glad you found us! Keep us posted as you put your 500 back in service.

With that TX-11, you will be able to pull in FM stations from miles, and I mean LOTS of miles, away. IF, that is, IF!, you get yourself an FM antenna. I have my internal home cable system connected to a big antenna in the attic, which pulls in FM from 200+ miles away. Probably get more reception, if I didn'thave 100ft of cabling, distribution boxes, etc, in the mix, but it works great for me.

Blondie Heart Of Glass

I mowed the lawn today, and after doing so I sat down and had a cold beer. The day was really quite beautiful, and the drink facilitated some deep thinking on various topics. Finally, I thought about an age-old question: Is giving birth more painful than getting kicked in the nuts? Women always maintain that giving birth is way more painful than a guy getting kicked in the nuts. Well, after another beer, and some heavy deductive thinking, I have come up with the answer to that question. Getting kicked in the nuts is more painful than having a baby; and here is the reason for my conclusion. A year or so after giving birth, a woman will often say, "It might be nice to have another child." On the other hand, you never hear a guy say, "You know, I think I would like another kick in the nuts." I rest my case. Time for another beer.

December 12 2023. UPDATE: After the closing of the company that owned license to Bob Carver's designs and products from 2019 to 2021, I asked Bob if he was willing to take one more swing at audio together, to combine our strengths and repair the damage to his legacy from the previous attempt. In Feb 2022 Bob Carver LLC was founded as the IP holder and BC Audio was founded as the manufacturer. A start-up while facing headwinds from a typhoon of negative feedback related to the Crimson 275 has been tough to say the least. Seeing the legacy of a brilliant man who has given his life to improving our listening experience, tarnished by the previous attempt was gut wrenching for me personally. I know Bob Carver the man vs the unfair insinuations and allegations being made about his intent and design of the Crimson 275. Bob is all about customer satisfaction as the main reason for doing this work. Bob offered refunds for 30 days at that time in 2022 and then extended it to 90 days. Bob also offered to change the chassis ground at no charge for those who wanted the change. We still offer that change at no charge if the customer sends it in. Bob profited nothing from the previous attempt but stood behind his name like the good man that he is. What I've learned about the Crimson 275's produced from 2019 to 2021, after having many come in for the updates: The grounding on the Crimson 275 is actually quiet safe. Similar to the audio components you own from the 1980s without safety grounded plugs (sometimes not even polarized) and metal chassis, or the millions of tube amplifiers made before the 3 prong plug was even invented. A full short potential was 6 volts at only mA of current Not even a tingle. Very few Crimson 275s had a polarity issue. Maybe one builder on one day. The vast majority had no issue, judging from the build dates on either side of the poor review specimen that have came in for ground changes. The transformers used are the exact parts Bob specified for the 275. The 15w Edcor are a Carver design from over a decade earlier. The 275 is a type of performance to weight ratio experiment. Building a great sounding 75w @ 1K tube amp weighing less than 20lbs for less than $3K, being serviced and Made in the USA was the target. The previous license owner did not change the Bob Carver designated parts. The Black Magic 275 uses the same parts with a few manufacturing updates.. Specs gone wrong As a dealer, I had no doubt about the power output of the Crimson 275 from experience. Customers had positive feedback comparing to others of 3 times the 275s power rating. If you notice, tube amplifier power ratings by most any company, you will generally find the power rating stated at 1Khz as standard practice, in comparison to solid state specs that generally state a 20Hz to 20Khz bandwidth quantifier in the spec.. The reasoning for this is the older tube amp designs being soft on bass. Still today, many tube amps tend to roll off in low frequencies, so they state power at 1Khz.. The Crimson 275 power spec should have been stated as 75w @ 1Khz like a tube amp, not 20Hz to 20Khz like a solid state. I suspect this was a salesman spec error but I was not involved and can't say for sure. The RAM 285 is one of few tube amps that can make it's full power to below 20Hz, so the power rating on the RAM 285 is not an error, but instead of 19lbs it weighs 56lbs. Bye for now.

Hello all! I hope you're enjoying the Carversite! and all it has to offer. The current Administrators are: wrf - Lead Administrator Nahash5150 - Tech Staff AndrewJohn - Community Administrator The current Moderators are: Compwaco - Chief Global Moderator Sk1bum - Moderator An Administrator's job is to protect the community. Admins also assign medals/badges, approve new arrivals, organize the boards, moderate threads, assign roles, maintain the database, enforce the rules, and manage complaints. They also present ideas to the leadership for possible implementation. The Lead Administrator sets the agenda and the rules and manages all the Member Groups. The Community Administrator keeps the information organized, performs regular tasks, and manages the Moderators. Moderators keep the boards safe and fun. Moderators are not here to stifle free-speech, arm-twist or intimidate participants. They ensure that threads are kept organized and remain on-topic, and as active participants themselves, preserve the spirit of the community. Moderators, like the Admins, are here for you so that you feel welcome to share and participate without the worry of being harassed or flamed for it. If you have just signed up, then you are Inbound rank. You have limited access and you can't upload files yet. In order to advance to basic membership, you need over 6 positive reputation points. Reactions, such as 'thank you' to your content increase your positive reputation. There are three basic member Roles: Novice Member Resident A Novice is new to the forum. They have limited access but can participate in the most popular forums such as Way Offscale and The Chain. In order to advance to Member, we expect a certain amount of activity to evaluate their willingness to be a part of the community. The post count required to advance to Member is 100. (If you are currently a Member and don't have 100 posts, you will not be 'demoted'). A Member is considered an active participant. They have nearly full access to the site and its resources, and can progress in rank and earn medals by sharing their experiences in the audio world with the Site. As time goes on, a Member can eventually become a Resident or play a role as part of the Administration. A Resident is a highly active member who calls this place 'home' and acts as a council member with the Administration. Residents are participants who are willing to take on the challenge of discussing site policies and provide the site with valuable resources - such as funds, time and talents. Greatly concerned for the site's well-being, Residents work hard to welcome new 'inbounds', encourage participation by starting topics of interest - and offer Karmas, skills and knowledge to all who visit. There is a special Member Role: Carver repair/mod Team Carver repair/mod Team - Chosen only by the Administrator, these members are trusted with their skill to work on audio gear. They actively take work and offer a variety of services. They are also essential to the site's 'helpful hand' in assisting those who need help with their troubled gear. Carver Repair Team members are also Residents by default. There are two consequential Roles: Retired Sandbox A Retired Member is a participant who has either shown a disinterest in the community but has not violated the rules, or one who has 'moved on' and no longer wishes to be an active member. This is not a disdained Role, but a Role for members who for one reason or another, do not wish to be part of the community's growth (for example). Retirement is a friendly, mutual agreement between the administration and the member. Retired members have limited access. When a participant is Sandboxed, they have violated the forums rules. A warning is always issued before a participant is Sandboxed. If the warning is ignored, and participant continues to break rules or cause trouble - an Administrator, with the consent of the Moderators, will curtail their activity for an indefinite amount of time. Removal of the Sandbox status can only be done by the Site Owner or Administrator. This forum has a lot of options for you to find information, participate, and organize how you read and keep up with activity. Remember that you can do the following: - Follow a Topic (so that if anyone posts to it, you are notified) - Follow a Member (so that you are notified of Status Updates and more) - Post a Status Update (a personal message for your friends that is public access) - Send Private messages - View Activity according to date, member, or topic (check 'Activity' in the top menu) - Post pictures and even create a gallery (Novice or above rank) - Share links, videos and files - Browse technical Manuals, white papers and spec sheets And so much more! Our goal is to maintain a site that is welcoming, helpful, courteous and fun. With audio and Carver as our common ground, we wish to stay focused on the music, and all the creativity that results. Have a great day! Hashy