The Dynaco Tube Audio Forum

Dedicated to the restoration and preservation of all original Dynaco tube audio equipment - Customer support for Tubes4hifi VTA tube amp and preamp kits and all Dynakitparts.com products


    My first restore

    ttownscott
    ttownscott

    Posts : 29
    Join date : 2018-07-31
    Age : 54
    Location : Tacoma, WA

    My first restore Empty My first restore

    Post by ttownscott on Sun Aug 12, 2018 2:47 am

    Like many I had a Dynaco ST-70 in my youth. I was given one in college and used it all throughout and then left it with one of my roommates when I graduated.

    Now I'm a bit nostalgic and decided I wanted to fit one into my system. Doing a search and wow. These guys are expensive! Looks like free was out of the question, but I found one without tubes for $330 and I actually have a matched set of EL34's for a different amp anyway.

    So after research, I realize there are some first things first, such as replacing the selenium rectifier and upgrading the cap. I ordered the bias kit and a quad cap from Dynakitparts and will check the transformers. Then I plan on striping everything off the chassis and cleaning it up and repainting the transformers. I am optimistic based on the other posts I have seen.

    This is not going to be a VTA70 build. I would like to build one of the VTA120 or M-125 sets after this though. I will just use one of the ebay 6GH8A boards to keep it as stock as possible.

    I would like to get a recommendation of what chassis resisters to use if I replace them and where is a good place to buy them. I am also on the fence about weather it is necessary to use new tube sockets or retension and re-use the existing ones.

    With out further adieu. Her is what I am starting with.

    The amp with cover:
    My first restore 7GWe9bVRWARutW5dy0Zh-C7H9QcgAtbWiYhJfFqkVL44075-9BCSt_NDQvTx7FiAH7wwiyoBVPYiEn9QGiUNUjeJujyjd69CbU10ScDreNbXqlYexVC8Sl3-w3byqb2zAB5ChLkUAXF4VOaHitw2Y4PXzukEJhc5X3T-ZX6gx_3eJQi4zjIiqlTmHj6b_8QjEqSVmYfaIUdLiTsV1VERyFVIP0Ky5xu10xMHppOe6Kknho5l6MN0bsM9pR5oEPiKo9UaQgc-oeh-VlAdFf3zxBp_UJgQHivzeOsXy80bpT9vZxhn0D-rso5IP_OZ5H4o_OiU_jrOV3eWcA43LZPFN0hzKV1uUgOKL6Uf6qb3ng-90F_4OERI0gI2Qsh6psT-eojmSPdwdoSkHF-opaDCmhu4moB11-YIgb-iEkzt3liuCZwo7hujHI6wj5WQNrrEIbeh1fMbpWGCCjQC5GVL69UaIBCQjev1yJVacruekwXJ31AR6OYsqm0E3s6OVinI5YNar4JopVH0odApLHvGKLscOLNqJbejV49nrDjmvQwHUG9AsCe6Y6G0YucZWSssSj4OU5gjMqg4xc3FRfuSB_SOgMvhWdENbaZ7_9k-K70owaKugnED-l4lxh0n4FnXYC74F3n0lWSXPVfN40nCWpE7S_bA96LA=w652-h868-no?

    Cover off
    My first restore DFbAiCNrMqnQri386e6nHX_wsFyVaFwLpO1AXJvN0dKWDUvjy0FpUbGQ522VQmbVjNhKI75rkxI-PmJl4iWEr09g-Mgva6DmsryhuGbgc9O1NoEAYKVjAYkWO0HQLQcBFWkwwGDHW0Z9JctMM1lMMHaXOAMz2D6csWQtkWooCwoo0Iw4ty0aO1GcJkaYf_i2MEhppLuY_6MElPKHM-BrsSYjLjb0Ic2u78nOqpYla59orF9CiuGXFcNMfzKjPQHCx114jSWS0MObK3TFFxwwuLHkk3RyRQo0xjYPr-F5C3yt7Xr0YUTj9EyCOEv1jetq4kU0DIYa4fzoEV7yMI_NGRTcLMcj6CLC1VfcbrWAJCt1Tz2IDhuARMWRfw1zkemRyeQPqxcPoJ7F27zY2M_W68yEeCZTHuiSPHfo8dUZioKhGv5VReOum8vwyB_hpI0sgaAAVvFnI2HbpRI_7uBvIeD0VoMAh4ncJ7dMKfw5qzhIKuyZvA5zqZkeh9powntmYdwjkdKiM3fhm_IrrjLYHJ9OODJLuoqEheLKG6yAbAeD--Vcj5pGxl-_oZK1_UTzHKGXdiPnHStO4rLEpneRcV0NHCRQXGFf8kAUi9cBFKzeX-YkJf7avzVUpqXNE72HS3tBzXSGKpn-GyUA_sQpR80h5YD2XCHD=w1158-h868-no?

    The underside
    My first restore NNJllUD_i2OhJ5fdIHWd_W3mB1KERzZjmqIw3bEC7Obj5JbALmZwRZu5bTWh6MEff3X_M5y3nTglSSOyWXVD9Ilq73Qh0Uf-0bts1Ug6cGVjp8jlLqi3M6U2hTB0jIIHAaGdHiZ1lWrCF_p3LiM4KDYIcAnwrfu0ipRquSAau4GeDItqzk9HDAtAwXq27a_MxoiIZLrmoeiPpmtZmVifGSek-1II911qLO4DQodci2XtWZvlh54Oibxk-r2FJhMoxanZRxOTukq6VFA8V49B3v1qiN5cPbkJdaCf5JVI2GgDFMYboHwsN8CwvRg8FApaOr9d2qM0Goi4TCclMT3QGyMRrOSEG5NttpKx9x4I2s3PeU4AtrDruij-iKiklxTqqmA5m2RsjOpTRQrH9sDuJmZ8mdhYVEopUNABQPqbn8Gb8J0h4xSt1Bt6S46x2q-sRk2sgnOmJgzOWxJGzEl5t60PKuhJdkv5sgF3mhqMgVGxmITxARmsdaEkc6ZbDsEh94N_3BNpXu4FtptJr8fGv-3YHmy7TZosRVfJrWSuXd5rtCxFOu9QPi2n4Biv5rA2YtSsSGOiR6QNNzumGk_MJqBH2sGPcDhoGRMNqzP6xc2zBRTDZDpggXo-1JSJX7AKeVVkleWHKQSq5o9EG8EAVPqT9KUFd7To=w1158-h868-no?


    Look at those original Dynaco caps!
    My first restore RnLIW5hE8uV14oZ1iBzl32jI30aMoSFEDMGoVgm4phHvDcZBvVCAtVGDASotkr_8AJjd8P1lNegT0Kc1n01zXczt0p5mMK5eY1cHEfpskGdAAaK6j0n31T6mu7XkXCOHNGJxmgH3ZQ4zICWW832T4382K3PddKBYmb1NHtp42KM2jgp1t_kqyiHoa7DER-V8Thoi85wcr-Bkd4DdJZRX91lpBWGOeqBXCK7hd9FobTD4ll1pdjMzjVK_yGXhRstO0IkomVB8-_M0Lfo4V3s12yaSoPABpclmiD6uR1JeGJgW5GKnL_L60oHEvZJntCNq8Lzih1_epvUIlHbQlutfSlZ3zQugHbrG5_5zKU3hiSyAGaxLKLKhxT5ptB_-JXpTOBxI7oqJgyKJQ3anXVVLEaCaaiUJNA8BtcG_v1QpPDYnHKQw2tcstm15QjYrOFds6zje2gYnbxcL_lzxh6rQOwOuoQDiLfQtgChvqw4PUOPZ3Kty3_tZ9bPYbIWm7Z0fToQCaZOP83_ZdzkA4M_bykx-sFZoUQaKQM-IPaoypAnkEFRqB97IC1BGgfjwVhxibfbijKWeb7br0C6KgdMQieeP5o9JfiBQwE8H_OTiYhQ4pyHwN7IyS9vfT1MdJOfNeTOwyjaYliaZ3gFrD5oRGN0YSFzu8JaN=w652-h868-no?

    My first shipment from Dynakitparts
    My first restore XXkvHxRDXLZ7iW0FBlutJJ1V7AsUpEMHbmVpM1dOJORNiIVibGrEv8oCUimufRTTyHr5-1qjhSEzfN0QmsJ0Jgb_AdsUPejn9DjzXezOKQ9mwTyJXmn2Oa9ZeFJD8q7m-j-CXdEdDA01EziLvla9iYOL6HT3fpQtXkfpsSf7PZZYOax5UwFurwieo9xzDDNj1Ul5s_U5oWjR53hFaZw_Y7kBajZBCBJ56s6BCWcItv7gSD8Du9X5xjGgPrsCRKVZf3lXFsZ-E7QcwIYopc-0YOVIfUMr11vzP_63H4GIpfmnenNOuTm_ysOgoGhLrJmpFFmeHUJYEQXPQ5sz1qforbya7NMhTDN7vvnACZ8WscCiUXYaVm2RTiqkd-81JDZBvRflcjfLV7IgxC7MCEAsH1HdMYHacgifxDwDVkzhAISSVrE67gF6-333Sm9-a-Q6JEE-h6X0KZ4b6oErW9kcYIoYCy9yxs7vToFXNRgkZyrVMKYUoRpBTNBiKe8rtE51Juaz5PTyNQHpOyPnp5adFB_6BGK51cf0sRxkE-o3Dh543VlOLmvzdRbHAbA957z9Uk9O4TE8jSkXyqDpw0oWoCHqCdmQM6W_xd7lY7sJMDAur4fJ7CPoKrOTA-l85v99fO7Qo6_PiKcl2FFbTWOupTjtzl06nu7p=w652-h868-no?
    WLT
    WLT

    Posts : 102
    Join date : 2013-07-13
    Location : Rochester NY

    My first restore Empty Ask over at the "basket"

    Post by WLT on Sun Aug 12, 2018 10:50 am

    Great post and I will respond but not here. Your request for a discussion should be posted in the Basket section not in the photo section of this forum. I have a pair of Dyna MK IIs that I am doing a similar restore to. I will respond accordingly if you repost this request over there. Thanks
    ttownscott
    ttownscott

    Posts : 29
    Join date : 2018-07-31
    Age : 54
    Location : Tacoma, WA

    My first restore Empty Re: My first restore

    Post by ttownscott on Sun Aug 12, 2018 3:02 pm

    Thanks. I'll keep this for progress and re-post over there

    Sponsored content

    My first restore Empty Re: My first restore

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