ampaddict

Damn, that's sad. Sorry to hear

The original ones had deterioated rubber and I think the new ones sound a lot better. They will nearly always fail on the originals and I believe one ones I chose to repalce them are a sensible choice. I can definitely hear more detail, which I like and I don't find them at all too bright.

I didn't find I needed to. I don't find the repalcement mids too bright at all.

Further information: For sale a pair of gorgeous Infinity Kappa 8 reference speakers. Near mint condition with no noticeable blemishes to woodwork, face or covers. These speakers are one of the most stunning looking and sounding vintage speakers ever made. Tremendous soundstage, incredible low end and smooth, natural highs. Made by Infinity in the US in 1986, when they were at the top of their game, before they were bought out by Samsung and made into a mass market brand. Huge at 122cm high, 52cm wide and 32cm deep at base. These speakers need to be driven and I'm just not doing them justice with the small amps I have. A reluctant sale as I'll never see the likes of these again. They would be a stunning addition to any serious audiophile setup. The manufacturer's ratings for the Kappa 8 include a frequency response of 33 to 44,000 Hz ± 3 dB, nominal impedance of 4 to 8 ohms, an efficiency (sensitivity) of 87 dB sound-pressure level (SPL) at 1 meter with 1 watt input, and a recommended amplifier power of 50 to 250 watts All drivers working as they should. High quality upgraded midrange drivers from Midwest Speaker Repair in Minnesota, USA. From their website: "Great overall sounding midrange for any home audio application, but main design is for Infinity Kappa series speakers. We believe our MM-2150 midrange surpasses the overall tonal quality of all these older Infinity mids. The dome is a cloth fabric and will not get old and brittle like the original Infinity polydomes. We had our midrange designed to replace the Infinity 902-3075 midrange which is 4 ohms. It is a perfect drop in replacement with no modification needed. In comparison, our midrange is a little brighter, so you may have to dial back the L-pad for the midrange on the crossover. Be careful of others selling a different brand that is 8 ohms, the Infinity crossovers are designed for 4 ohm mids". Price is for the pair. Can deliver to Perth and the Southwest for free, else pickup only from Vasse. Photos: PLEASE READ If you include any reference to pricing whatsoever in this section (excluding RRP), your ad will not be approved If you are advertising multiple items, you must post one bulk price only, or post seperate ads for each item If you don't include photographs of the actual item being sold, your ad will not be approved You understand that a reasonable donation for selling fees is expected upon successful sale of your item - if you have previously sold items and not made a donation, your advertisement may not be approved.

ah, of course, thanks. Schoolboy error!

Still on the back burner I'm afriad! I have all the parts including top Nichicon LKG filter caps ...

This RG-2 has been restored to a very high standard. All eletrolytics replaced with quality Panasonic FM, Nichicon FG and Kemet film caps. New properly earthed mains lead with Australia plug. This is a global voltage model currently set to 240V. All functions work noise free and as intended. Great addition to any Blue Line/Fluroscan rack or system. Here's a demo: Happy to post and will pack well. This unit is under 5kg. Also selling a Pioneer SR-303 Reverberation Amp, listed separately

This SR-303 has been restored to a very high standard. All eletrolytics replaced with quality Elna Silmic II, Panasonic FM and WIMA film caps. New properly earthed mains lead with Australia plug. This is a global voltage model currently set to 240V. All functions work noise free and as intended. Great addition to any Blue Line/Fluroscan rack or system. Here's a demo video: Happy to post and will pack well. This unit is under 5kg. Also selling a Pioneer RG-2 Dynamic Processor, listed saparately

Further information: As part of my shedding of Blue Line Pioneer components, this TOTL tuner is for sale. It's in perfect condition and quartz locks onto stations with ease. Happy to demo to local people who can travel to Vasse, W.A. or ship anywhere via courier or Aus Post. I always pack my equipment extremelty well and will give options on courier/postage. Photos: PLEASE READ If you are advertising multiple items, you must post one bulk price only, or post seperate ads for each item If you include any reference to pricing whatsoever in this section (excluding RRP), your ad will not be approved If you don't include photographs of the actual item being sold, your ad will not be approved

I have someone interested, so it is sold pending payment. I will mark the ad as sold once payment is received. Thanks for your interest.

Selling my beloved Pioneer Blue Line series, piece by piece. This RT-909 is in perfect original condition and is fully functional. One of the plastic feet has a crack but still funtions and supports the unit well. It comes with 2 genuine Pioneer PR-101 reels (No.1 on one and No.2 on the other side), plus a pair of genuine PP-220A 10.5" reel adapters. Plus 2 sets of genuine hub shims. Multi-voltage model 120V/220V/240V selectable at rear and set to Australian 240V with correct fuse. I'll throw in some new, unopened blank tape stock too. That's nearly $1000 worth of accessories included. It's an amazing piece of equipment. Happy to pack securely and to arrange courier or for you to arrange your own courier as you prefer. I can provide video demo on request or demo in person for those able to visit Vasse, W.A. Photos: PLEASE READ If you are advertising multiple items, you must post one bulk price only, or post seperate ads for each item If you include any reference to pricing whatsoever in this section (excluding RRP), your ad will not be approved If you don't include photographs of the actual item being sold, your ad will not be approved

Hey Jake, I have a near mint SA-9800 here in Perth. Happy to set it up, do a demo video and upload to YouTube ... I can post the link here once done

Would you consider posting to WA 6280? Happy to pay what you ask and postage on top, up front. thanks, Brad

Traced it back to one of the decoupling caps I added to the underside of the board. I've simply removed them both and hey presto, all is good. Are they really necessary? Thanks everyone for your input. I have another 555A that I'm going to do a real number on to include a nickel plated chassis and upgrades similar to this: Leestereo's Restoration/Upgrade of a Sansui AU-555A | Audiokarma Home Audio Stereo Discussion Forums Cheers, Brad

Legend, thanks Mike. Will let you know how I get on ...

Thanks Mike. I have a Rigol DS1052E digital oscilliscope but not that experienced in using it. I also have a digital signal generator. Would you advise to send, for instance a 1KHz sine wave into the Left Aux RCA then measure the signal from the speaker terminals back through the signal path? Will begin with an audio probe as this seems less complicated ?

I agree Pete. I also have another PCB untouched original that is identical - photo. I'm really stumped as to where the LH distortion is stemming from. RH is outstanding. Listening through headphones makes no difference either. I know it's something in the main amp but I seemed to have tried everything.

That bridge is part of the standard PCB tracks as per SM. rails are 48v each measure at F002/003.

double and triple checked caps and replaced all transistors on both sides, that's what's very strange. Even replaced the ceramics, just in case. Edited my original post with a lot more information ...

Hey folks, I held off for a few weeks to try and nut this one out myself but have hit a wall. I've recapped the entire amp and replaced all small transistors. RH sounds absolutely amazing but LH is very distorted. 1. Checked that it was not a speaker issue by swapping LH/RH 2. Checked that it was not a preamp issue by swapping Aux LH/RH inputs - LH amp out still distorted 3. Swapped out tone boards from a spare AU-555A - no change 4. Swapped out Preamp boards from a spare unit - no change. To me, this points to only an issue with the main amp. Swaps: TR801/802 - XA495G ->> KSA992F TR803/804/807/808 - 8002-1 ->> KSC2690A TR805/806 - 2SC281 ->> KSC1815 (attached to heatsink) TR809/810 - 9002-1 ->> KSA1220A TR815 - 2SC627 ->> ZTX694B PS caps upgraded to Vishay BC C001 2200uF ->> 4700uF C002/004 470uF ->> 1000uF C003 1000uF ->> 2200uF Main amp C819/820 1500uF ->> 1800uF All other electros swapped like for like values with Nichicon FG/Panasonic FM and WIMA MKS2. All resistors checked Left to Right and all in spec and matching. Output transistors swapped for MJ21194G but not difference (old ones reinstalled) Centre voltage set to 28.5V Bias voltage set to 12mV DC offset at around 20mV at the speaker terminals Sorry, my previous post sent too early ? hfe_sansui_au-555a_schematic.pdf

to confirm I stuffed up one of the KSA992 pairs, I had the bases connected, instead of the emitters. Thanks again!

pickle me Grandma! I swapped out IC1 and 2 from the working unit and all is fine. You were right, it must have been my poor pairing of the KSA992's. I'll go back and redo the KSA992 pairs carefully, as the 2SA798's in the ICs are noise prone. Thanks for all you help Mike, you're a legend!

I swapped out the 2SC1951 with same from a working unit as I thought they looked sus. I have ZTX694B on order from E14. There's something else causing all these discretes to appear shorted I think. Pulled the Zener ZD601 (EQA01-13R) and diode tested OL one direction and 0.67V the other - that seems ok.

Double checked and same. Using a DBT so may explain the lower voltages? TR10 looks a little more normal e= -.063V b= -1.2V c= -29.35V TR03 e= -29.33V b= -29.35V c= 24.85V TR05 e= 24.90V b= 24.96V c= 25.05V

thanks Mike. R35 checked spot on 6.8. I don't have a replacement to hand but I do have a 6.2ohm .5W carbon. TR09 diode tested fine when removed and here are the gnd Vdc readings: E = 23.98V - 24.15V fluctuating C = 23.95V - 24.55V fluctuating B = -29.35V stable I'm recapping as I go, so perhaps the fluctuation is the caps settling in?