• The swap meet forum is for private non-commercial transactions. Only unmoderated members can post here.

    diyAudio provides this forum for the convenience of our members, but makes no warranty nor assumes any responsibility. We do not vet any members. Use of this facility is at your own risk. Customers can post any issues in those threads as long as it is done in a civil manner. All diyAudio rules about conduct apply and will be enforced.

RCA 7189 for sale

7189 beam tetrode tubes. Often seen as a premium version of the EL84 but it is a pin compatible and still somewhat different tube. As all good stuff comes in uneven numbers these are a lot of 3. These are from unknown source and a very long time ago so I can not tell anything this time not even with 100% certainty if they are new or used. They appear new.

No guarantees, no warranty, no gentleman's agreements, no nothing. You judge by the pictures. I will guarantee very good packing. Make me an offer I can not refuse by PM. If the offer is too low there will be no reaction. EU only!
 

Attachments

  • IMG_7978.jpg
    IMG_7978.jpg
    129.7 KB · Views: 88
  • IMG_7979.jpg
    IMG_7979.jpg
    126.6 KB · Views: 91
Last edited:
Ridiculous. There's no asking price and each of these tubes could be DOA (for example, busted heaters) or test so poorly as to be practically unusable (they can even come off the assembly line that way). I'm usually not critical of such things, but I do sell tubes occasionally and this just screams for being called out, to be very, very frank. I would offer them for the price of postage to someone willing to take a huge chance. That's just my .02 (or whatever).
 
In my particular book I give stuff like this away for free to friends and diy folk. I've received the same from friends and diy folk. Sometimes I've asked to pay for stuff better than this, and had it sent to me au gratis (including shipping in two instances) and asking me to promise to pay it along. Which I have, multiple times.

If someone shipped me a set of tubes represented like this under the same terms, and they ended up testing and sounding good, I'd be immediately asking if I could give them something in return (money, trade, etc). It's simply called being honorable.
 
Last edited:
Giving stuff away is called a charity. It usually brings equal benefits for both sides. Charity can't be forced. It's an internet era and it's fairly easy (unfortunately for flippers like myself who used to rob widows from their dead hubby's cherished possessions for close to nothing -not anymore) to establish value and negotiate a deal under condition that the tubes in this particular example are good. If not the refund is expected and assumption is it will be provided. That is what's honorable in my book.
 
  • Like
Reactions: jean-paul
Of course this was just a joke 🙂 I do have the tubes and AFAIK they are new but these are a lonely few of which I recall nothing. Normally I like to know what I sell as a deal should be good for both seller and buyer. How old fashioned. All tubes I have are bought decades ago when reissues and plastic tubes did not exist yet. What was suspicious or used I simply discarded.

So I was simply curious. It seems many buy stuff from unknown sources (who can tell a source with stuff decades old? Does the source have any influence after 60 years?) from Chong Li in Chengdu via Aliexpress that also has no tube tester. Guaranteed till the package has left the warehouse.

It is just the wording and perceived reputation. If I would be a guru selling untested 2SK170/2SJ74 no one would blink an eye. So people seem to prefer to buy from a perceived neutral middle man (Ebay etc.) or a person with a reputation. Apparently it is not about the goods, it is about the emotion. Certainly when flock/herd membership emotions occur.
 
Last edited:
  • Like
Reactions: mbrennwa
Sad but true. I noticed the same. Many think Ebay etc. add something quality but just like estate agents they add a markup. Also a person with perceived reputation IMHO makes no differences to the product. Is a 60 year old E88CC tube from factory X sold by famous Sean Eastlake different from buying a 100% identical tube (for way less money!) from a guy at diyaudio.com? These tubes once left the factory in the same carton box and they both slept in dust forgotten for decades. Neither seller can prevent these tubes from being leaky nor offer a replacement when it is a lot of 3.
 
Last edited:
A "quality" that ebay adds is a returns policy that in my experience usually rules in the buyer's favour with return postage paid by the seller. This includes items marked as "no returns", where the item is faulty.

The emotional value comes from all those photos of the item which you don't get with proper tube dealers; people like to see what they're buying! On the flip side emotions can get carried away in a bidding war in those last few seconds; it's in our nature to try and win even if that comes at a high price. Besides, people don't always realise they're paying over the odds, as there are usually similar "buy it now" listings with massively over inflated prices for items which don't sell, however seeing those inflated BIN prices could influence the buyers to bid more in the auction style listings.

Everyone's heard of eBay. I suspect most tube amp owners would struggle to name (m)any proper tube stores which is why some of those stores now have outlets on eBay. I image there to be old stores in France full of the amazing valves they made, but for some reason I have not been able to locate any on the web; perhaps it all went to their military and got crushed 🙁

I've had mostly good dealing through eBay and it's been good source to me for NOS made in the Soviet Union.
 
Sold!

It is a cultural thing as my experiences with dealing with fellow DIYers or directly with persons here in Europe has a high price/quality ratio. The human filtering factor actually works OK and of course sometimes things go wrong but the number is low. Anything done via brokers or websites like Ebay is cold (but convenient) and profit/gains maximized (IMHO!). That is for other people that keep virtual clean hands 🙂
 
Last edited: