Tektronix AA5001 Distortion Analyzer Refresh and Restoration

Подписаться 3 тыс.

50% 1

First off let me say THANK YOU to all that have joined the lab and helped us get there we are today. Content is based of viewer questions and comments. And will continue to be.
Ways to support the channel:
Patreon - / zenwizard_studios
Paypal - Zenwizard@Zenwizardstudios.com
In this video We go through and take a look at an AA5001 distortion analyzer. This is the 5000 series unit based on the AA501 and AA501 A units. These are quite similar. This one was giving another Tech some trouble and needed to be gone through. So it will get the fill treatment as well as an alignment before heading off to continue life as a distortion meter.
** Repair exposes the Tech to mains electric and should only be done by trained personnel. Errors can be fatal. **

Наука

Опубликовано:

27 мар 2024

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист

Посмотреть позже

Комментарии : 8

@EJP286CRSKW 4 месяца назад

My AA501/01 has two rear interface connectors. I think it's a late one. It has the 22-22kHz and CCIR filters, and RMS and IMD options.

@ZenwizardStudios 4 месяца назад

The option 1 is what is giving it CCIR and changed the filters if I remember correctly. There was a way to order an AA501 with SMPTE or CCIR or both if I recall correctly. OP1 and 2 Both added IMD. There was also a variant that was made for radio service IMD was replaced with SINAD this was sometimes sold as the DA4084

@jgeorge6081 3 дня назад

So you did not replace the tantalums? I have found those to be very problematic in some older modules, although this one is likely from the 80’s. In an older sc504 I found that about 80% of the 22uf tants were bad. Would love to hear your thoughts.

@ZenwizardStudios 2 дня назад

My current understanding and finding are tantalum caps are fairly robust if the unit was stored well over time. Moisture ingress from a crack or other physical defect will always be an issue. In terms of electrical issues tantalum capacitors are not tolerant to voltage overload and die very quickly when over volted. There are some design and engineering issues in some TEK equipment in this area. TEK did not put a lot of headroom in the ratings on some designs for instance using a 16Vdc tant on a 15Vdc rail. It is so close to the line with the creep up in line voltage as well as the degradation of power supply capacitors this can cause some over volting issue in the capacitors. This if I remember correct was a customer unit as well. So I am beholden to customer needs and wants. In this case the customer wanted a unit that would hold up and be trouble free for a while as well as meet factory specification. So without replacing the tants the unit aligned and calibrated and was fully operational.

@solodolo6018 4 месяца назад

Hey Zen would I be able to use this peice of equipment to measure the distortion of audio amplifiers?

@ZenwizardStudios 4 месяца назад

That is one thing the AA501's are made for. You would want a load for the amp but put the AA501 across a dummy load and the amp will let you know when it is distorting. The only hard part is the AA501's take a few seconds to stabilize. You would also need to get a low distortion source to drive the amp as a AA501 is just a meter and does not have a source. The usual source is a SG505. Though an SG502 could also be used depending on the distortion level of interest.

@solodolo6018 4 месяца назад

@ZenwizardStudios thank you for the information! I do have a 502 but I'll have to keep an eye out for a 505 as well. I honestly did not know about that model. There's so many 500/5000 series plug ins! I've been toying with the idea of recording my audio repairs and uploading them to RU-vid so people can learn more about the units I have as there is not a lot of information on them. I thought it would be unique to measure the distortion on them and compare it to their specs since I normally dont see that in the videos I watch.