Telefunken EF800/CV5092/6BX6 tube. This tube is absolutely new and in immaculate condition.

The EF800 is the milspec/professional longlife, low noise version of the EF80/6BX6.

It is the gold standard for the Miktek CV4 Mk9 Bock Audio 241, Stam Audio SA-47, Golden Age GA-47 etc.

These tubes are from the late 1960ies/early 1970ies made in the legendary Ulm factory.

You will find the Telefunken diamond <>on the bottom of each tube and the Ulm factory code on the glass.

Each and every tube will carefully be tested before shipping to guarantee best performance.

The tube is guaranteed to be new and unused from professional service stock!

Please also visit our new Analogkontor shop for more items, great prices and sales tax free shopping for non-EU customers!!

Important Corona Pandemic notice:

Due to the global Corona pandemic delivery times may take longer than usual due to limited fright and handling capacities in the destination countries. Depending on the ever-changing pandemic situation it may also happen, that we need to cancel orders, if shipping services to your home country are suspended. Sorry about the inconvenience and thanks for understanding.

Good news: shipping to the US, Canada and Australia is available again but you may need to be patient....the ways of transportation are still somewhat random. Some parcels travel like normal, few seem to take ages. Thanx!

Terms & Conditions

Service

Please do not hesitate to contact us for any question regarding any of our products. Before or after buying. We are here to help!

Additionally, we do have thousands of items in stock which may not be displayed here. Please feel free to message us your “most wanted” list!?We will be happy to search our stock and answer as quickly as possible!

If there are any complaints after the sale, we will always help to find a solution. Please see our feedback and buy with confidence.

Return policy

Our products are mostly New Old Stock (NOS). Even though we test each and any item before shipping, it always may happen that these fail in your equipment or that you simply do not like what you bought. Therefore, we take back any item you buy within 30 days should you want to return it. No questions asked, full refund, no fuss.

Refund on safely returned items only, without exception!!

Testing

All tubes or other electronic items we are selling are tested prior to shipping unless otherwise stated in the item description (e. g. tubes in sealed boxes or offers which are clearly marked as untested). The tube testing is done either on a Neuberger RPM 375, a Funke W19S or a TV7-U. All these testers are from military provenance and are in excellent working order. You may ask for test results and pictures of the testing prior to purchasing any of our items if this information is not already present in the item description. The results on either of these testers is the only relevant in case of complaints.

Resistors & capacitors are tested on a Genrad 1657 LCR bridge.

Unless anything else is stated in the item description, we are not testing for hum/noise nor can we guarantee that any of the tubes we are selling are working hum/noise free in your application or “sound” good to your ears. Hum/noise or disappointing sound are hence not regarded as defect to the items. In any of these cases the return policy laid out above will be applied.

Feedback policy

We will leave positive feedback as soon as we have received positive feedback from our customers. We are very sorry for this rule, but increased feedback scam in recent months no longer allows for earlier positive feedback.

Shipping

We usually ship within 3 days after payment but always try to be faster.

We will ship to absolutely any corner of this planet and we try to ship to the lowest fares possible.

Please be aware, that remote destinations (seen from Western Europe) may take some extended time for delivery. Also, slow customs and postal service at the final destination may slow down delivery extensively. However, most parcels should arrive with 10 to 15 days after being dispatched.

Shipping will be as registered airmail parcel from Deutsche Post or German DHL parcel service. We will provide a tracking code which allows tracking with most local postal providers like USPS etc. as long as your home country participates in the international postal tracking system.

We can offer UPS global expedited shipping(delivery within 5-7 days or even quicker) to many destinations for a very moderate additional fee, please inquire if you are interested in this fast delivery option.

If your home country does not participate in the international postal tracking system, tracking will end most likely at the German border.

If your country participates in the international postal tracking, you will be able to track this parcel with the tools provided online by your local postal service (e.g. USPS Track & Confirm or Hongkong Post Mail Tracking) as soon as the parcels has cleared at customs.

To avoid unnecessary shipping, please ask before ordering if you are not entirely sure what you are ordering or whether this item will meet your needs. I will be more than happy to try to clarify with you whether any of our products will work in your equipment or not.

Please be aware that there might be additional import taxes in your home country if you live outside of the EU.

With purchasing any of our items, you are accepting the above laid out terms and conditions.

If you are feeling uncomfortable with any of these terms and conditions, please let us know, so we can talk about it and clarify. If you do not agree, please do not bid. Thanks!