Description
ECC88 6DJ8 PQ AMPEREX HOLLAND 1971
This is a pair early ECC88 Amperex A-frame tubes made in Holland (Heerlen plant). They have the orange PQ label, indicating that they were selected for special quality. A legendary member of the ECC88/6DJ8 family. Tubes have grey shield and A-frame. Very healthy tubes with matching systems; see test results.
The acoustic properties of the PQ are legendary and widely known. I refer to the many threads on the web for more information.
Sonics
Excellent preamp valve, low noise, very smooth extended highs, very good in phono stages. Balanced and smooth sounding with liquid midrange, recommended!
Electrically and Physical Matched Pair
Test results*
| Date code | Ia1 (mA) | Ia2 (mA) | Gm (mA/V) | Gm2 (mA/V) | |
| Tube 1 (V64) | Δ1K3 | 15,6 | 14,1 | 12,3 | 12,2 |
| Tube 2 (V65) | Δ1K3 | 14,1 | 14,2 | 12,3 | 12,6 |
Tested for leakage and gas.
* Where 100% is : Ia = 15 & Gm = 12,5. NOS is ±10% of rated values. Rating see Home Page. Test method see Category Page.
Short description
| Tube type | ECC88 |
| Quantity of Tubes | One pair |
| Brand | Amperex |
| Manufactured in | Heerlen, Netherlands |
| Date codes | Δ1K3 (november 1971) |
| Construction | Creases on the top of the bottle, silver risers |
| Getter Construction | Dimpled disk, A-frame, grey shield |
| Print Condition | Excellent; see pictures |
| Box included | New white box |
| Equivalent tubes: | 6922, 6DJ8 |
| General test results | NOS |
